Otis Shumway - from original glass negative image process; Florence Wildermuth Andes' grandfather (her mother's father)
b. 21 July 1792 or 3; d. 31 Jan. 1879. Scan made off the original glass negative . If Otis is 60 years old - the date of this original glass neagtive would be estimated @ 1853. NOTE: Glass negative (wet plate): Glass plate coated with a layer of collodion (cellulose nitrate dissolved in ether) and sensitized in a solution of silver salts. Recorded far greater detail than paper negatives but required the photographer to coat the plate immediately before use and to develop the exposed negative before the collodion dried. Published in 1851; gained popularity throughout the 1850s, almost entirely replacing the paper negative by 1860. Remained in use until about 1880, when "dry plates" were introduced. (Also called "wet collodion" process.)
