[4 Leorune riy De. Livio Stnva, wRvone rue SHANGUAI AwATHUN PuoTO-
Dr. Duncan J. Reid who was in the chair introduced the lecturer, who spoke as follows Derusrtion or Sussect.
"The subject of this evening's lecture deals sith the "Chemistry of Photo phy "—a branch of Photography, the knowledge of which has a good part in the successful carrying on of its operations.
The photographic operations are very numerous snd complicated indeed, but the work is made far more difficult by the enormous amount of prescriptions given to us by many books, whose authors often are incompetent to deal with the subject themselves. Therefore, it is necessary to have a clear understanding of the pro-° cesses which take place in the photographie operations. The knowledge of these pro-ceases constitutes the "Chemistry of Photo-
Text read from the printed page and cleaned; old type leaves the occasional error.