Harry Gem
Videos
Major Thomas Henry Gem, known as Harry Gem, was an English lawyer, soldier, writer and sportsman.
Captain Harry Gem in his Birmingham Rifle Volunteer Corps uniform in 1868
Tennis ball
Videos
A tennis ball is a small, hollow ball used in games of tennis and real tennis. Tennis balls are fluorescent yellow in professional competitions, but in recreational play other colors are also used. Te
A Penn tennis ball
A tennis ball sliced open to show its rubber bladder
Tennis balls and internal "blanks" manufactured by Dunlop Slazenger
A training tennis ball