216 H. Wurtz on Sodium Amalgamation. 
The discovery is the more interesting when coupled with that 
of tungsten (scheelite) which I lately made known through this 
Journal, as existing along with dimen crystals of cassiterite in 
the neighboring town of Chesterfield. Wolframium is —— 
a stanniferous “neta in its geological associations. 
that we have it in all its known species, either in this region pe 
in the not far distant one of Monroe and Trumbull, Conn., we 
may well be encouraged to persevere in efforts to find tin in 
— peace not far distant. 
wite—This mineral was received in April, 1861, 
from Capt. rear the manager of the Chrome mines at Texas 
Pa., in a collection of minerals from that region ; but has beett 
left in my laboratory here unexamined until now. The crystals 
are scattered through a coarsely granular, pale green clinochlore, 
n, 8. C., Jan. 1 
Art. XXXI.— On Sodium Amalgamation; in a letter from 
Henry Wurtz to Professor B. SILLIMAN. 
In the opinion of yourself and others upon whose judgment 
I rely, the time has = for sae promulgation of the discov- 
eries made by me, now many years since, of certain new propel’ 
ties ee the altel wenaia. 3 rendering them of value in the amalga- 
mation of ores of the precious metals, 
ou are aware that, pending the repeated investigations 
which I have conducted upon this important subject, I have 
communications of my results, both oral and written, from 
time to time to many persons, yourself among the number ; but 
that until the latter part of the year 1864, no final step was 
en to place these iscoveries mie ~ pay in a tangib 
Government was granted to me for me 
the s said discoveries; the Specification having been at my —— 
patent ¢ did not commence until the 27th of RS 1865. 
LS. eB ee EIS es MRE EOE ho oe te ae gee 
