There was a large attendance of the members of this Society at the meet held on Thursday night in the Union Church Lecture Hall, and great interest was shown in the lecture given by Dr. Reidon photographic apparatus. The doctor gave a lucid explanation of the principles on which a camera is constructed. Both by blackboard demonstration and from a camera, he showed th use of the "rising front" and the swing-back. He gave a very clear account of the different varieties of lenses in use, and a most useful exposition of the method of calculating the relation of the stops" to one another. "Phe lecture, which lasted an hour, was of great. value not only to the tyros present but to older hands. AMter the lecture there was a brief dis. cussion. The room was then darkened for an exhibition of lantern slides, Mr. E. Wheen kindly lending and working the Intern. The Society wasfortumate in having present atthe meeting Dr, Reid Mack: Who was with Sir Thos. Lipton on bos the Shamrock in the Into international yacht race. Dr. Mackay showed sixty Deautiful views of the chrnipion yachts. Those pictures are probably uniqtic, and the members were fortunate in seeing them. Other slides were exhibited by M. Chaumont of scenes in Japan and Shanghai, and Inv. Christian of views on the Upper Yangtze. These were of a very high enter. This second meeting of the Society was a very successful one.
Text read from the printed page and cleaned; old type leaves the occasional error.