1XXX1V PROCEEDINGS—PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
It is hoped all will use their influence to increase the member¬ 
ship, and do everything they possibly can to help forward the Section 
in every way. 
WINTER SESSION, 1889-90. 
The following Meetings were held:— 
31st October, -1889. 
Opening Address by J. W. Munro, B.A., Chairman of the Section. 
Exhibition of Lantern Slides by Fry & Co. London. 
28th November, 1889. 
Paper on “The Latent Image.” By Cosmo Innes Burton, B.Sc., 
F.C.S. 
23rd January, 1890. 
Paper on “The Conditions of Rapidity.” By J. W. Munro, B.A. 
1 st March, 1890. 
Paper on “Detective Cameras.” By W. Frew, F.C.S. 
27th March, 1890. 
Paper on “ Photography as applied to Engineering.” By Thos. 
Reid, University College, Dundee. 
SUMMER SESSION, 1890. 
The following Excursions were arranged :— 
1. May 22.—To Glen Turret. 
2. June 7.—To the bank of the Tay, from Perth to Kinfauns. 
3. June 21.—To Newburgh. 
4. July 5.—To Killiecrankie. 
5. July 19.—To Stanley. 
6. August 2.—To Almondbank and Methven Loch. 
7. August 16.—To Dunkeld. 
8. August 28.—To Leven, Largo, Crail, and St. Andrews. 
