Astatine is a radioactive chemical element with symbol At and atomic number 85. It is the rarest occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived. A sample of the pure element has never been assembled, because any macroscopic specimen would be vaporized by the heat of its own radioactivity; the bulk properties of astatine are not known with any certainty. Many of them have been estimated based on the element's position on the periodic table as a heavier analog of iodine, a member of the halogens. Astatine is to have a dark or lustrous appearance and may be a semiconductor or a metal. Chemically, several anionic species of astatine are known and most of its compounds resemble those of iodine, it shows some metallic behavior, including being able to form a stable monatomic cation in aqueous solution. The first synthesis of the element was in 1940 by Dale R. Corson, Kenneth Ross MacKenzie, Emilio G. Segrè at the University of California, who named it from the Greek astatos, meaning "unstable".
Four isotopes of astatine were subsequently found to be occurring, although much less than one gram is present at any given time in the Earth's crust. Neither the most stable isotope astatine-210, nor the medically useful astatine-211, occur naturally. Astatine is an radioactive element. Most of its isotopes are unstable with half-lives of one second or less. Of the first 101 elements in the periodic table, only francium is less stable, all the astatine isotopes more stable than francium are in any case synthetic and do not occur in nature; the bulk properties of astatine are not known with any certainty. Research is limited by its short half-life. A visible piece of astatine would vaporize itself because of the heat generated by its intense radioactivity, it remains to be seen if, with sufficient cooling, a macroscopic quantity of astatine could be deposited as a thin film. Astatine is classified as either a nonmetal or a metalloid. Most of the physical properties of astatine have been estimated, using theoretically or empirically derived methods.
For example, halogens get darker with increasing atomic weight – fluorine is nearly colorless, chlorine is yellow-green, bromine is red-brown, iodine is dark gray/violet. Astatine is sometimes described as being a black solid, or as having a metallic appearance; the melting and boiling points of astatine are expected to follow the trend seen in the halogen series, increasing with atomic number. On this basis they are estimated to be 610 K, respectively; some experimental evidence suggests astatine may have lower melting and boiling points than those implied by the halogen trend. Astatine sublimes less than does iodine, having a lower vapor pressure. So, half of a given quantity of astatine will vaporize in an hour if put on a clean glass surface at room temperature; the absorption spectrum of astatine in the middle ultraviolet region has lines at 224.401 and 216.225 nm, suggestive of 6p to 7s transitions. The structure of solid astatine is unknown; as an analogue of iodine it may have an orthorhombic crystalline structure composed of diatomic astatine molecules, be a semiconductor.
Alternatively, if condensed astatine forms a metallic phase, as has been predicted, it may have a monatomic face-centered cubic structure. Evidence for the existence of diatomic astatine is inconclusive; some sources state that it does not exist, or at least has never been observed, while other sources assert or imply its existence. Despite this controversy, many properties of diatomic astatine have been predicted; the latter figure means that astatine may be metallic in the liquid state on the basis that elements with a heat of vaporization greater than ~42 kJ/mol are metallic when liquid. The chemistry of astatine is "clouded by the low concentrations at which astatine experiments have been conducted, the possibility of reactions with impurities and filters, or radioactivity by-products, other unwanted nano-scale interactions." Many of its apparent chemical properties have been observed using tracer studies on dilute astatine solutions less than 10−10 mol·L−1. Some properties – such as anion formation – align with other halogens.
Astatine has some metallic characteristics as well, such as plating onto a cathode, coprecipitating with metal sulfides in hydrochloric acid, forming a stable monatomic cation in aqueous solution. It forms complexes with EDTA, a metal chelating agent, is capable of acting as a metal in antibody radiolabeling.
AT (form factor)
In the era of IBM compatible personal computers, the AT form factor referred to the dimensions and layout of the motherboard for the IBM AT. Like the IBM PC and IBM XT models before it, many third-party manufacturers produced motherboards compatible with the IBM AT form factor, allowing end users to upgrade their computers for faster processors; the IBM AT became a copied design in the booming home computer market of the 1980s. IBM clones made at the time began contributing to its popularity. In the 1990s many computers still used its variants. Since 1997, the AT form factor has been supplanted by ATX; the original AT motherboard known as "Full AT", is 13.8 × 12 inches, which means it will not fit in "mini desktop" or "minitower cases". The board's size means that it takes up space behind the drive bays, making installation of new drives more difficult; the power connectors for AT motherboards are sockets. As designed by IBM, the connectors are mechanically keyed so that each can only be inserted in its correct position, but some clone manufacturers cut costs and used unkeyed connectors.
The two power connectors it requires are not distinguishable, leading many people to damage their boards when they were improperly connected. Technicians developed mnemonic devices to help assure proper installation, including "black wires together in the middle" and "red and red and you are dead." In 1985 IBM introduced Baby AT and soon after all computer makers abandoned AT for the cheaper and smaller Baby AT form factor, using it for computers that spanned several generations, from those that used 286 processors to the P5 Pentium and a limited number of Pentium II systems. These motherboards have similar mounting hole positions and the same eight card slot locations as those with the AT form factor, but are 2 inches narrower and marginally shorter; the size 13 × 8.5 in and flexibility of this kind of motherboard were the key to success of this format. The development of bigger CPU coolers—and the fact that they blocked full-length PCI and ISA cards—spelled the end of Baby AT and was the main impetus for its successor ATX.
While the AT standard is now considered to be obsolete, some industrial computers still use it. In 1995, Intel introduced ATX, a form factor which replaced older Baby AT motherboards. During the late 1990s, a great majority of boards were either Baby AT or ATX. Many motherboard manufacturers favored Baby AT over ATX as many computer cases and power supplies in the industry were still designed for AT boards and not ATX boards; the lack of an eighth slot on ATX motherboards kept it from being used in some servers. After the industry shifted to ATX motherboard configurations, it became common to design cases and power supplies to support both Baby AT and ATX motherboards; the connector at the board is two Molex 15-48-0106 connectors. This mates with a Molex 90331. Motherboards of AT and Baby AT Baby AT Power Supply Baby AT Case Full AT Case Full AT Power Supply ATX Power Supply Links AT power supply connectors with pinouts PC Magazine
The kip is the currency of Laos since 1952. One kip was divided into 100 att. In 1945–1946, the Free Lao government in Vientiane issued a series of paper money in denominations of 10, 20 and 50 att and 10 kip before the French authorities took control of the region; the kip was reintroduced in 1952. The kip was sub-divided into cents. Coins were issued in denominations of 10, 20 and 50 att or cents with Lao inscriptions. All had a hole in the centre, like the Chinese cash coins; the only year of issue was 1952. In 1953, the Laos branch of the Institut d'Emission des Etats du Cambodge, du Laos et du Vietnam issued notes dual denominated in piastre and kip. At the same time, the two other branches had the similar arrangement with the riel in Cambodia and the đồng in South Vietnam. There were notes for 5, 100 and 100 kip/piastres. In 1957, the government issued notes denominated in kip; the notes were for 1, 5, 10, 20 and 50 kip printed by the Security Banknote Company, 100 kip printed by the Banque de France and a commemorative 500 kip printed by Thomas De la Rue.
1 and 5 kip notes printed by Bradbury & Wilkinson, a 10 kip by De la Rue were introduced by 1962. In 1963, 20, 50, 200 and 1000 kip notes were added, all printed by De la Rue; these were followed by 500 and 5000 kip notes in 1974 -- 75, again by De La Rue. A 1975 10 kip by Bradbury & Wilkinson and a 1000 kip by De la Rue were printed but not circulated; the Pathet Lao kip was introduced sometime before 1976 in the areas which were under the control of the Pathet Lao. Banknote denominations of 1, 10, 20, 50, 100, 200 and 500 kip were issued; the notes were printed in China. In 1976, the Pathet Lao kip replaced the Royal kip throughout Laos following the Pathet Lao's take over of the country; the exchange rate between the two kip was 1 Pathet Lao kip = 20 royal kip. On 16 December 1979, the old Pathet Lao “Liberation” kip was replaced by the new Lao kip at a rate of 100 to 1. Coins were again issued in Laos for the first time in 28 years in 1980 with denominations of 10, 20 and 50 att, with each being struck in aluminum and depicting the state emblem on the obverse and agricultural themes on the reverse.
These were followed by commemorative 1, 5, 10, 20 and 50 kip in 1985 for the 10 year anniversary of the Lao People's Democratic Republic. However, due to the economic toll of the Soviet collapse in 1991 and the persistence of chronic inflation, there are no coins in circulation in Laos. In 1979, banknotes were introduced in denominations of 1, 5, 10, 20, 50 and 100 kip. 500 kip notes were added in 1988, followed by 1000 kip in 1992, 2000 and 5000 kip in 1997, 10,000 and 20,000 kip in 2002 and 50,000 kip on January 17, 2006. On November 15, 2010 a 100,000 kip banknote was issued to commemorate the 450th anniversary of the founding of the capital and the 35th anniversary of the establishment of the Lao People's Democratic Republic. Kaysone Phomvihane is pictured on the obverse of the 2,000, 5,000, 10,000, 20,000, 50,000, 100,000 kip banknotes; the Bank of Laos governor announced on January 25, 2012 that the Bank of Laos would issue 100,000 Kip banknotes as a regular issue on February 1, 2012 to encourage Lao people to use the national currency instead of U.
S. dollars and Thai baht
An automatic transmission called auto, self-shifting transmission, n-speed automatic, or AT, is a type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Like other transmission systems on vehicles, it allows an internal combustion engine, best suited to run at a high rotational speed, to provide a range of speed and torque outputs necessary for vehicular travel; the number of forward gear ratios is expressed for manual transmissions as well. The most popular form found in automobiles is the hydraulic automatic transmission. Similar but larger devices are used for heavy-duty commercial and industrial vehicles and equipment; this system uses a fluid coupling in place of a friction clutch, accomplishes gear changes by hydraulically locking and unlocking a system of planetary gears. These systems have a defined set of gear ranges with a parking pawl that locks the output shaft of the transmission to keep the vehicle from rolling either forward or backward.
Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels. Besides the traditional hydraulic automatic transmissions, there are other types of automated transmissions, such as a continuously variable transmission and semi-automatic transmissions, that free the driver from having to shift gears manually, by using the transmission's computer to change gear, if for example the driver were redlining the engine. Despite superficial similarity to other transmissions, traditional automatic transmissions differ in internal operation and driver's feel from semi-automatics and CVTs. In contrast to conventional automatic transmissions, a CVT uses a belt or other torque transmission scheme to allow an "infinite" number of gear ratios instead of a fixed number of gear ratios. A semi-automatic retains a clutch like a manual transmission, but controls the clutch through electrohydraulic means.
The ability to shift gears manually via paddle shifters, can be found on certain automated transmissions, semi-automatics, CVTs. The obvious advantage of an automatic transmission to the driver is the lack of a clutch pedal and manual shift pattern in normal driving; this allows the driver to operate the car with as few as two limbs, allowing individuals with disabilities to drive. The lack of manual shifting reduces the attention and workload required inside the cabin, such as monitoring the tachometer and taking a hand off the wheel to move the shifter, allowing the driver to ideally keep both hands on the wheel at all times and to focus more on the road. Control of the car at low speeds is easier with an automatic than a manual, due to a side effect of the clutchless fluid-coupling design called "creep" that causes the car to want to move while in a driving gear at idle; the primary disadvantage of the most popular hydraulic designs is reduced mechanical efficiency of the power transfer between engine and drivetrain, due to the fluid coupling connecting the engine to the gearbox.
This can result in lower power/torque ratings for automatics compared to manuals with the same engine specs, as well as reduced fuel efficiency in city driving as the engine must maintain idle against the resistance of the fluid coupling. Advances in transmission and coupler design have narrowed this gap but clutch-based transmissions are still preferred in sport-tuned trim levels of various production cars, as well as in many auto racing leagues; the automatic transmission was invented in 1921 by Alfred Horner Munro of Regina, Saskatchewan and patented under Canadian patent CA 235757 in 1923.. Being a steam engineer, Munro designed his device to use compressed air rather than hydraulic fluid, so it lacked power and never found commercial application; the first automatic transmission using hydraulic fluid may have been developed in 1932 by two Brazilian engineers, José Braz Araripe and Fernando Lehly Lemos. They were incorporated into GM-built tanks during World War II and, after the war, GM marketed them as being "battle-tested."
Modern automatic transmissions can trace their origins to an early "horseless carriage" gearbox, developed in 1904 by the Sturtevant brothers of Boston, Massachusetts. This unit had two forward speeds, the ratio change being brought about by flyweights that were driven by the engine. At higher engine speeds, high gear was engaged; as the vehicle slowed down and engine RPM decreased, the gearbox would shift back to low. The metallurgy of the time wasn't up to the task, owing to the abruptness of the gear change, the transmission would fail without warning. One of the key developments in arriving at an automatic transmission was the use of planetary transmission in the vehicle's gearbox; the first use of, in the Wilson-Pilcher made between 1900 and 1907. The Wilson-Pilcher used two epicyclic gear trains allowing 4 forward gears to be selected by moving a single gear change lever. In this form of gearbox the planetary gears are in constant mesh, all, required is to use a mechanism to fix or release the rotation of the outer gear ring.
The action of the
Assistive technology is an umbrella term that includes assistive and rehabilitative devices for people with disabilities or elderly population while including the process used in selecting and using them. People who have disabilities have difficulty performing activities of daily living independently, or with assistance. ADLs are self-care activities that include toileting, eating, bathing and grooming. Assistive technology can ameliorate the effects of disabilities that limit the ability to perform ADLs. Assistive technology promotes greater independence by enabling people to perform tasks they were unable to accomplish, or had great difficulty accomplishing, by providing enhancements to, or changing methods of interacting with, the technology needed to accomplish such tasks. For example, wheelchairs provide independent mobility for those who cannot walk, while assistive eating devices can enable people who cannot feed themselves to do so. Due to assistive technology, people with disabilities have an opportunity of a more positive and easygoing lifestyle, with an increase in "social participation," "security and control," and a greater chance to "reduce institutional costs without increasing household expenses."
The term adaptive technology is used as the synonym for assistive technology. Assistive technology refers to "any item, piece of equipment, or product system, whether acquired commercially, modified, or customized, used to increase, maintain, or improve functional capabilities of individuals with disabilities", while adaptive technology covers items that are designed for persons with disabilities and would be used by non-disabled persons. In other words, "assistive technology is any object or system that increases or maintains the capabilities of people with disabilities," while adaptive technology is "any object or system, designed for the purpose of increasing or maintaining the capabilities of people with disabilities." Adaptive technology is a subset of assistive technology. Adaptive technology refers to electronic and information technology access. Wheelchairs are devices that can be manually propelled or electrically propelled, that include a seating system and are designed to be a substitute for the normal mobility that most people have.
Wheelchairs and other mobility devices allow people to perform mobility-related activities of daily living which include feeding, dressing and bathing. The devices come in a number of variations where they can be propelled either by hand or by motors where the occupant uses electrical controls to manage motors and seating control actuators through a joystick, sip-and-puff control, or other input devices. There are handles behind the seat for someone else to do the pushing or input devices for caregivers. Wheelchairs are used by people for whom walking is difficult or impossible due to illness, injury, or disability. People with both sitting and walking disability need to use a wheelchair or walker. Patient transfer devices allow patients with impaired mobility to be moved by caregivers between beds, commodes, chairs, shower benches, swimming pools, other patient support systems; the most common devices are Patient lifts, Transfer benches, stretcher or convertible chairs, sit-to-stand lifts, air bearing inflatable mattresses, sliding boards.
Dependent patients who cannot assist their caregiver in moving them require a Patient lift which though invented in 1955 and in common use since the early 1960s is still considered the state-of-the-art transfer device by OSHA and the American Nursing Association. A walker or walking frame or Rollator is a tool for disabled people who need additional support to maintain balance or stability while walking, it consists of a frame, about waist high twelve inches deep and wider than the user. Walkers are available in other sizes, such as for children, or for heavy people. Modern walkers are height-adjustable; the front two legs of the walker may or may not have wheels attached depending on the strength and abilities of the person using it. It is common to see caster wheels or glides on the back legs of a walker with wheels on the front. A prosthesis, prosthetic, or prosthetic limb is a device, it is part of the field of biomechatronics, the science of using mechanical devices with human muscle and nervous systems to assist or enhance motor control lost by trauma, disease, or defect.
Prostheses are used to replace parts lost by injury or missing from birth or to supplement defective body parts. Inside the body, artificial heart valves are in common use with artificial hearts and lungs seeing less common use but under active technology development. Other medical devices and aids that can be considered prosthetics include hearing aids, artificial eyes, palatal obturator, gastric bands, dentures. Prostheses are not orthoses, although given certain circumstances a prosthesis might end up performing some or all of the same functionary benefits as an orthosis. Prostheses are technically the complete finished item. For instance, a C-Leg knee alone is not a prosthesis, but only a
Aviation electronics technician (United States Navy)
Aviation electronics technician is a US Navy enlisted rating or job specialty. At the paygrade of E-9 ATs merge with the aviation electrician's mate rating to become avionics technicians. There has been talk of merging the two ratings, but as yet no definite plans have been announced. Aviation electronics technicians wear the specialty mark of a winged Helium atom. Aviation electronics technicians perform intermediate level maintenance on aviation electronic components supported by conventional and automatic test equipment, including repair of weapons replaceable assemblies and shop replaceable assemblies and perform test equipment calibration/repair and associated test bench maintenance. Aviation electronics technicians perform organizational level maintenance on aviation electronics systems, to include: communications, navigation, antisubmarine warfare sensors, electronic warfare, data link, fire control and tactical displays with associated equipment; the rating now known as AT can trace its origin to World War II, when the rating of aviation radio technician was established on 11 December 1942.
This rating was re-designated aviation electronics technician's mate on 31 October 1945. Effective 2 April 1948 the name of the rating became aviation electronics technician. A separate rating, aviation electronicsman was absorbed in 1955; the former ratings of aviation fire control technician and aviation antisubmarine warfare technician were absorbed into the AT rating effective 1 January 1991. ATs were at one time further subdivided into aircraft equipment, ground equipment and navigation equipment and navigation equipment and airborne CIC equipment; the ground equipment duties are now served by an aircraft support equipmentman. The ordnance duties remain a separate rating, these personnel conduct far less electronics troubleshooting, their training is more aligned with explosives-handling. All of the other subdivisions have since been re-merged back into the AT rating. ATs perform duties ashore all over the world, they may work indoors, outdoors, in a shop environment, in an aircraft squadron or on an aircraft carrier.
They work with others, require little supervision, do mental and physical work of a technical nature. ATs, as well as the other members of the Navy's aviation community, are sometimes referred to as "airedales" by those in the surface or submarine forces, they are sometimes referred to as "trons", "tron chasers", or "tweaks", most as "tweets or tweety birds" within the aviation community. Billy C. Sanders, the fifth Master Chief Petty Officer of the Navy, first served as an aviation electronics technician. There are two types of ATs: intermediate and organizational; these two levels do not change how they are addressed. However, their duties are different, I-level and O-level ATs take different advancement exams, as if they were different ratings. Furthermore, I-level technicians' A-school is twice as long as O-level technicians. I-level technicians work on the individual printed circuit boards within an actual component such as a radio, they are the technicians that connect the component to a test bench to simulate an aircraft, troubleshoot and repair the equipment.
In some instances the technician will not repair specific circuit card assemblies. I-level AT's are assigned to fleet readiness centers on shore or aircraft intermediate maintenance departments aboard ships; the most challenging and demanding specialty that AT's can have is to be a calibration technician. Without properly calibrated gear such as test sets, spectrum analyzers, frequency counters, gauges, torque wrenches, transducers, the rest of the maintenance ratings, for aircraft and ships alike, would not be able to do their jobs effectively. I-level AT's are expected to have some electronics engineering knowledge, are not expected to know much about aircraft-specific systems. O-level technicians troubleshoot various discrepancies with the use of multimeters and avionics test equipment to locate faults within the aircraft. An O-level AT will determine if the discrepancy that the aircrew reported is an aircraft-wiring problem or a system problem. If the problem is aircraft wiring, the AT will repair the wiring problem on the aircraft.
If the problem is determined to be an assembled component of a system, the assembly will be removed and turned in to AIMD for repair. The assembly can be replaced with parts that the squadron may keep as spares in order to keep the aircraft operational. Keeping spare parts at the squadron-level is not standard operating procedure, but these rules are relaxed during intense operations due to the need for expedient turn-around. In addition to their separate duties as electronics technicians, O-level AT's are sometimes combined with aviation electrician's mates and aviation ordnancemen into a work center called IWT; as electronics have migrated into other aircraft systems, the IWT team is given the duties of maintaining the armament and weapons systems, whereas a separate AT workcenter is responsible for non-weapons based electronics such as communications and navigation. This is done at the organizational level, is not Navy-wide. O-level AT's are as
Atchison County, Kansas
Atchison County is a county located in northeastern Kansas, in the Central United States. As of the 2010 census, the county population was 16,924, its county seat and most populous city is Atchison. The county is named in honor of a United States Senator from Missouri. For many millennia, the Great Plains of North America was inhabited by nomadic Native Americans. From the 16th century to 18th century, the Kingdom of France claimed ownership of large parts of North America. In 1762, after the French and Indian War, France secretly ceded New France to Spain, per the Treaty of Fontainebleau. In 1802, Spain returned most of the land to France. In 1803, most of the land for modern day Kansas was acquired by the United States from France as part of the 828,000 square mile Louisiana Purchase for 2.83 cents per acre. In 1854, the Kansas Territory was organized in 1861 Kansas became the 34th U. S. state. In 1855, Atchison County was established. According to the U. S. Census Bureau, the county has a total area of 434 square miles, of which 431 square miles is land and 2.6 square miles is water.
It is the fourth-smallest county by area in Kansas. On July 4, 1804, to mark Independence Day, the Lewis and Clark Expedition named Independence Creek located near the city of Atchison. Doniphan County Buchanan County, Missouri Leavenworth County Platte County, Missouri Jefferson County Jackson County Brown County Sources: National Atlas, U. S. Census Bureau U. S. Route 59 U. S. Route 73 U. S. Route 159 Kansas Highway 7 Kansas Highway 9 Kansas Highway 116 Atchison County comprises the Atchison, KS Micropolitan Statistical Area, included in the Kansas City-Overland Park-Kansas City, MO-KS Combined Statistical Area; as of the 2000 census, there were 16,774 people, 6,275 households, 4,279 families residing in the county. The population density was 39 people per square mile. There were 6,818 housing units at an average density of 16 per square mile; the racial makeup of the county was 91.62% White, 5.32% Black or African American, 0.55% Native American, 0.34% Asian, 0.06% Pacific Islander, 0.51% from other races, 1.59% from two or more races.
Hispanic or Latino of any race were 1.95% of the population. There were 6,275 households out of which 32.40% had children under the age of 18 living with them, 54.30% were married couples living together, 10.00% had a female householder with no husband present, 31.80% were non-families. 27.60% of all households were made up of individuals and 12.80% had someone living alone, 65 years of age or older. The average household size was 2.51 and the average family size was 3.05. In the county, the population was spread out with 26.70% under the age of 18, 11.30% from 18 to 24, 24.50% from 25 to 44, 21.40% from 45 to 64, 16.20% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 93.30 males. For every 100 females age 18 and over, there were 90.30 males. The median income for a household in the county was $34,355, the median income for a family was $40,614. Males had a median income of $29,481 versus $20,485 for females; the per capita income for the county was $15,207.
About 7.90% of families and 13.30% of the population were below the poverty line, including 13.80% of those under age 18 and 17.90% of those age 65 or over. Atchison County has been a swing county for most of its history, it has had multiple extended streaks of being a bellwether county, the first running from 1896 to 1936. After voting more Republican than the nation in the 1940s & voting for losing candidate Richard Nixon in 1960, another bellwether streak ran from 1964 to 2004. Since the county has become more Republican, with Barack Obama failing to win the county in both of his victories & Hillary Clinton losing it by over 30 percent to Donald Trump in 2016. Atchison County was a prohibition, or "dry", county until the Kansas Constitution was amended in 1986 and voters approved the sale of alcoholic liquor by the individual drink with a 30% food sales requirement. Atchison County Community USD 377 Atchison USD 409 Atchison Effingham Huron Lancaster Muscotah Atchison County is divided into eight townships.
The city of Atchison is considered governmentally independent and is excluded from the census figures for the townships. In the following table, the population center is the largest city included in that township's population total, if it is of a significant size. National Register of Historic Places listings in Atchison County, Kansas Standard Atlas of Atchison County, Kansas. A. Ogle & Co. Official sitesAtchison County - Official Atchison County - Directory of Public Officials Atchison County - Chamber of CommerceHistoricalAtchison County - History, Kansas State Historical Society Atchison County - Historical SocietyMapsAtchison County Maps: Current, Historic, KDOT Kansas Highway Maps: Current, Historic, KDOT Kansas Railroad Maps: Current, 1996, 1915, KDOT and Kansas Historical Society