90 BENJAMIN SILLIMAN. 
results of the optical examination of the Micas (1850); on 
Gay-Lussite from near Ragtown, Nevada (1866), in which the 
occurrence of this mineral in process of formation is described ; 
on Priceite a new borate of lime (1873); on Platinum and 
Tridosmine at the Cherokee Gold Mine, California (1878); 
Tellurium ores of Colorado (1874); on the occurrence of Gold 
with scheelite in Idaho (1877); on Jarosite in Arizona (1879); 
on Vanadates, Chromates and Tungstates in Arizona (1881); 
on the Iron Mountain of Durango, Mexico (1882). 
In the department of mineralogy he always took an active 
interest.. His opportunities for collection were large and he 
accumulated a fine cabinet which, in 1868, was sold to Cornell 
University, where it bears the name of the Silliman Cabinet. 
The mineralogical collections of Yale College are indebted to 
him for various gifts; and through his personal solicitation of 
funds the Baron Lederer Collection was secured, in 1843, for 
the college. 
Other papers by him relate to meteoric stones and irons, a8 
those of Burlington, N. Y., Lockport, N. Y., of Texas, of Con- 
cord, N. H., Shingle Springs, Cal.; points in geology and 
physical optics; photographic edxpébitnetits with the voltai¢ 
arc, then a matter of novelty; the illuminating powers of 
gas, etc. 
Professor Silliman delivered one of the addresses on the 
occasion of the celebration of the Centennial of Chemistry 4 
Northumberland, Pennsylvania in August, 1874, which took 
the form of a full list of American Contributions to Chemisty 
up to the date of the meeting; it extended to one hundred 
and seventy-six pages and is a valuable historical work, thé 
result of a vast amount of labor. It contains a — list 
of his own papers up to the time of publication. 
Mr. Silliman, throughout his life, but especially in dis last 
twenty years, gave a large part of his energies to work ip : 
applied science, including the examination of mines, the prep” 7 
