lxiv PROCEEDINGS—PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
park below are streaked with golden russet, and the sycamores with 
patches of brick-red. The ash has branches which have turned 
bright yellow, but the oaks are still a dull green, which, in time, will 
turn to yellowish brown. Here and there the pines stand out with 
heads of deepest blue-green, and stems that show purple in the 
evening sun. 
Soon, however, the glories of crimson and yellow begin to fade, 
and a more uniform tinge of russet spreads over the woodlands, and 
then, by degrees, the brown skeletons begin to show themselves again 
more and more each day, as, one by one, the leaves lose their vital 
connection with the organism which gave them birth, and fall to the 
ground to mingle their substance with the inorganic dust once more. 
At the conclusion of the Address a number of beautiful slides 
were exhibited, illustrating the Woodlands of Perthshire. 
PHOTOGRAPHIC SECTION. 
The following Meetings were held during the Winter Session :— 
23rd November, 1899. 
Demonstration on Bromide, Gravura, and Velox Printing. By C. 
F. S. Burrows. 
28th December, 1899. 
Demonstration on Retouching. By A. Nicol. 
25th January, 1900. 
Demonstration on Lantern Slide Making. By H. Coates. 
22nd February, 1900. 
Exhibition of Members’ Lantern Slides, including a series of views 
of Bird Life on Ailsa Craig, by Chas. Kirk, Glasgow. 
22nd March, 1900. 
Demonstration on Photo-Process Engraving. By E. J. Carver, 
Glasgow. 
26th April, 1900. 
Paper on “Photographic Pastimes.” By J. Sime. 
