1889. Eikonogen developer patented by Dr. Andresen, of Berlin, Germany, March 26th.
— Wire frames and supports in camera extensions patented by Thomas Rudolph Dallmeyer and Francis Beauchamp, November 6th.
CONTRIBUTIONS TO PHOTOGRAPHIC LITERATURE.
BY
JOHN WERGE.
Originally published in the “Photographic News,” “British Journal of Photography,” Photographic Year-Book, and Photographic Almanac.
