Miscellaneous Intelligence. 441 
of all the machines oe Ne in this manufacture in different places 
ee countries of the 
The oceurrence ce of Laurite and Diamonds in the native 
Platinum wo Ore communication from Prof. WorsnLer 
o Dr. C. F. 
the new mineral composed of sulphid of ruthenium and s sulphid of 
osmium, which [ diseovered in the Borneo platinum, and to whic 
I gave the name of Lau ite. 
The crystals are very small, but by ig them fifty diam- 
eters it was possible to distinguish them by their peculiar luster 
from the dull grains of chromic iron. As it was impossible to 
separate the crystals of Laurite — the other minerals present, a 
quantity of the entire ore was subjected to chemical e me _ 
ec 
ric and ee fe e residue was then hat washed, 
n examining the meet thus purified, under the microscope, 
it was seen to contain numerous grains of undecomposed chromic 
iron, beside rio mine, and different transparent minerals, some 
colo red, some colorless, especially minute sri of — 
ewe ic aci 
ha 
Mecha shown* that it is a peculiar property of this ipiaghclary 
difficultly gs cit mineral, to give up all its sulphur on igni- 
tion in hydro 
The re aidan Ga was then treated with hydrochloric acid to remove 
iron. But although hydrogen was ee on the ar te “2 
ing ammonia to it, a white precipitate was obtained, which by ig- 
nition in hydrogen pled globules o: 
The ore t d from the iron and ‘tin was then ers ee with 
0. 
ruthenium was produced, and, at the same time was perceived the 
eppaiess odor of ruthenic acid, and later, the characteristic odor 
of o 
* Ann. Chem. Pharm., cxxxix, 116. 
