, 
42 Whitney’s Chemical Examination 
The original stellite, described by Thomson as occurring 
in Scotland, was probably an impure specimen of pectolite, 
which mineral it agrees with in external characters, as well as 
in chemical composition, merely substituting soda for mag- 
nesia ; a liberty which will not be considered as unwarrantable 
with respect to an analysis by Thomson. The mineral de- 
scribed by the same chemist under the name of Wollastonite, 
under the erroneous impression that that name had not been 
generally adopted for table-spar, is also evidently identical 
with pectolite. 
" 
Art. IV. — Examination of three new Mineralogical species 
proposed by Prof. C. U. Shepard. By J. D. Wurryey. 
In Silliman's Journal, Vol. IT. (new series) page 249, 
Prof. C. U. Shepard has described and named three new 
species of minerals, as he considers them, Arkansite, Ozarkite, 
and Schorlomite. They are all from the same locality, in 
Arkansas. As, according to Prof. Shepard's conclusions, these 
minerals were of the most interesting character, containing 
substances alike rare and difficult of detection, it seemed 
desirable that they should be more accurately examined, that, 
if their chemical composition was such as stated by Prof. 
Shepard, some idea might be obtained of their quantitative 
composition, and the proper formulas by which it might be 
expressed, or, if not, that their real nature might be made 
known. 
I have, through the kindness of Messrs. F. Markoe and F. 
Alger, obtained specimens of each of these three minerals, 
the results of the examination of which I will proceed to 
detail, in the order in which they are described by Prof. 
Shepard. 
I. ARKANSITE. 
This mineral is crystallized in right rhombic prisms. The 
specimens which I have are none of them sufficiently brilliant 
