John Herschel
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Sir John Frederick William Herschel, 1st Baronet was an English polymath active as a mathematician, astronomer, chemist, inventor and experimental photographer who invented the blueprint and did botan
John Herschel, 1835 mezzotint by W. Ward, after Henry William Pickersgill
Portrait of a young Herschel by Alfred Edward Chalon
Disa cornuta (L.) Sw. by Margaret & John Herschel
An illustration to Jules Verne's novel Hector Servadac from 1877 shows Herschel observing Halley's Comet in 1835 in Cape Town. Engraving by Charles Laplante after Paul Philippoteaux
Blueprint
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A blueprint is a reproduction of a technical drawing or engineering drawing using a contact print process on light-sensitive sheets introduced by Sir John Herschel in 1842. The traditional white-on-bl
John Herschel
…1792 – 11 May 1871) was an English polymath active as a mathematician, astronomer, chemist, inventor and experimental photographer who invented the blueprint and did botanical work. Herschel originated the use of the Julian day system in astronomy. He named seven moons of Saturn and four moons of Uranus…
Blueprint for a Butler-class destroyer escort, 1944
A member of the Women's Royal Naval Service operates a blueprinting machine during World War I
Architectural drawing, Germany, 1902
Architectural drawing, Canada, 1936