Glossary -Photographic processes and photograph formats
Argentic Bromide http://notesonphotographs.org/index.php?title=Bromide
Calotype / Talbotype http://www.edinphoto.org.uk/1_early/1_early_photography_-_processes_-_calotype.htm
Carte de Visite (CDV)
Usually measuring two and a half inches by four and an eighth inches (6.3 x 10.5 cm) mounted on card.
Available in the early 1860s, maintaining popularity to about 1895.
Usually measuring 4.5 inches by 6.5 inches (11.5 x 16.5 cm) mounted on card. Not extensively produced until 1880 and has ceased by 1905.
1905 to 1940s. 'Kodak Austral' and 'Empire' were two common brands of poastcard stationary, often with the name of the photographer printed or stamped on the back.
Frost, Lenore. Dating family photos: 1850-1920, Lenore Frost, Essendon, Victoria, 1991.