Trans. N. Y. Ae. Sez. 5 Oct. 24, 
On Anthracite Creek are found many thousand acres of anthracite of 
better quality than that of Pennsylvania. Recent analysis made at the 
School of Mines, New York, shows it to contain less than one per cent. 
of sulphur, and three per cent. of ash. 
The forest vegetation of Colorado is very simple. The pinion or nut 
pine is very common, also the yellow pine (P. Aonderosa), Douglas’ 
spruce, Menzies’ spruce, etc. In the mountains the general vegetation 
is picturesque but not so varied as in the lowlands. The following 
plants are among the most characteristic in the lowlands _of Colorado 
and Utah. , 
The evening primrose (Gothzra Cespztosa), with its large beautiful 
white flowers. 
The wild tobacco (Vzcotzana attenuata). 
The sun flower (Helzanthus). 
The bee flower (Cleome integrifolia), presenting purple acres by the 
roadside, and the yellow species (C. Zztea) less common. 
The American primrose (Przmula Parryz). 
The pasque flower (Azemone patens, Var. Nuttalliana). 
The Lrzogonums, about twenty species, coloring whole mountain 
sides yellow. 
The Oregon grape (Berberzs aguzfoléum). 
Phaceltia circtnata, in tufts of purple flowers on rocky slopes. 
The lily (Calochortus Gunnison? and C. Nuttallz), or “ black-eyed 
Susan” (Indian—* Seego”’), very plenty in the moister portion of the 
sage-plains. 
The clematis (Azemone alpina), with its purple flowers. 
The penstemons, of which 20 or 30 species are peculiar to that 
county, deep crimson, pink, and purple and blue in color, often very 
showy, and so abundant that whole acres of ground are colored by 
them. 
The columbine (Aguzlegia canadenszs), and also a much larger 
species (A. cerulea), clothing the mountains of Colorado and Utah, 
with blue, cream-colored, and white flowers. A large number of dried 
plants were exhibited from a collection of several hundred species just 
brought on from Colorado, with collections procured from Prof. Marcus 
Jones of Salt Lake City, and others. 
October 24, 1881. 
SECTION OF PHYSICS. 
Vice-president, Dr. B. N. Martin, in the Chair. 
Thirty-one persons present. 
Mr. W. LE Conte STEVENS read a paper, of which the following 
is an abstract. 
