297 
by moist organic matters. The existence of an Ammonium 
Silicate he believes has not hitherto been asserted. 
The Rey. J. T. GuLicK presented a specimen of a Snake, 
from San Jose, California, where they are found during the 
winter when the fields are converted into sloughs by continu- 
ous rains. 
Pror. A. M. Epwarps exhibited two fine specimens of 
Crystallized Emeralds, from the celebrated mines at Muzo, 
north of Santa Fe de Bogota. They showed the characteris- 
tic enclosing Black Limestone. He also exhibited several 
Butterflies, from the same part of the world. Remarking on 
the brilliant colors of most of these specimens, especially 
those possessing a metal-like sheen, he said that he had seen 
in alate number of the Canadian Entomologist that some 
dishonest dealers in Insects had dyed specimens of Lepidoptera 
with the Analine colors) He had experimented on this 
subject and exhibited specimens of Danais Archippus dyed of 
various colors, and suggested that a knowledge of the fact 
that they may be thus readily colored might be turned toa 
useful and honest account, and ornamental objects obtained 
for the use of florists as it was now the fashion to attach to 
boquets of natural flowers, and apparently hovering over 
them dried specimens of butterflies. By the use of the Ana- 
line dyes, the tint of the insect might be made to correspond 
with that of the prevailing flower. 
The following paper was read. 
Report on Meteorology for the month of November, 1871. 
By Pror. O. W. Morris. 
Barometer, Mean, 29°882 inches, Max., 30°374 on the 18th, 
Min., 29°308 on the 15th, Range, 1-066. 
Thermometer, Mean, 41°81°, Max., 63-4 on the Ist, Min., 
15:0 on the 30th, Range, 48-4. 
