The practical index of photographic exposure : with an appendix as to sensitometer numbers and rapidity of plates (1888)
Wormald, A. R., author · Sutton, Surrey : Published by the author and may be obtained of all photographic dealers · leaf 47
Advertisements. CINCE the introduction of rapid Dry Plates and the growing popularity of Photography as a pastime for Amateurs, their one great difficulty hfis been to correctly estimate the exact exposure required by a certain object. This is more especially the case in England, where the light is… … It is only necessary that the graduation of the Photometer should be compared once for all with the brand of Dry Plate proposed to be used ; but, for the guidance of Amateurs, the Company supply Instructions for \ise, founded on their own series of popular Dry Plates. Price to.?, 6 <t, Post free,
Photography · Optical instruments
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
