CXX PROCEEDINGS-PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
PHOTOGRAPHIC SECTION. 
OFFICE-BEARERS. 
Chairman —Dr. Andrew Thomson, F.R.S.E., F.C.S. 
Secretary —William Ellison. 
Committee —T. Bourke, A. Hodge, R. C. Ferguson, and James 
Stewart, L.D.S. 
The following Meetings were held :— 
27th November, 1890. 
Opening xAddress, by Dr. A. Thomson. 
Exhibition of Photographic Tools, by Dr. A. R. Urquhart. 
Exhibition of Lantern Views of the Cathedrals of England, by 
Wm. Ellison and James Stewart. 
18th December, 1890. 
Paper on “ The Carbon Process,” illustrated by the development 
of some Prints. By J. Robertson. 
Exhibition of Lantern Views of Cornwall and the Scilly Islands, 
by Wm. Ellison and H. Coates. 
19th March, 1891. 
Paper on “Development.” By D. Ferrier. 
Exhibition, by Wm. Ellison, of Swiss Views, taken by himself 
during the previous summer. 
