352 Determination of Carbon in Graphite. 
hands of those that know how to appreciate them; and such is 
also the history of the Rutherford iron. 
The mass as it first came into my possession (only a very 
small part being chiseled off ) weighed about nineteen pounds; 
it had an irregular oval shape, and was surrounded with a crust 
of about two millimeters in thickness, resembling the brown hy- 
droxyd of iron, the pure metal being here and there visible. 
This metal has the common lustre of iron—its fracture is very 
crystalline, and it is very malleable, though harder than any of 
the Tennessee meteoric iron, having taken longer time to be 
sawed. 
The specimen of it in my collection, weighs ten pounds and 
fourteen ounces; it has a polished surface of an irregular ellip- 
tical form of ten by six inches diameter, exhibiting fine Wid- 
mannstatian figures of a rhomboidal and triangular form. 
It seems pretty free from intermixture with other matter—only 
one circular mass of ,°;th inch in diameter is brought to light on 
the sawed surface, which, judging from its structure, and the 
action of acid upon it, I am inclined to consider as sulphuret of 
iron (magnetic pyrites); on the other surface are two small cav- 
ities, one of about :th and the other ;';th of an inch in diameter ; 
with these exceptions, the metal is homogeneous and compact. 
From an imperfect analysis to which I have subjected it, it 
appears to contain less nickel than any of the Tennessee meteoric 
masses, being composed of 96-00 iron, 2-40 nickel, and 1:60 mat- 
ter not examined. 
Arr. XX X1IX.—New Methol of determining the Carbon in Na- 
tive and Artificial Graphites, §c.; by Prof. R. E. Rocers 
and Prof. Wm. B. Rogers, University of Virginia. 
_ Iris well known that native graphite and the graphite of cast 
. - s y: 
iron,’* states that “concentrated nitric acid dro on the red 
hot graphite (of iron) has not the slightest action on it ; neither 
as sulphuric acid dropped into boiling nitric acid.” He found 
that “ with the exception of hydro-fluoric acid, no single chem! 
cal liquid seemed to have any action on those scales, and only the 
most concentrated hydro-fluorie acid slowly attacked them when 
in a state of most minute division.” Similar results have attend- 
ed our trials with various specimens of native graphite. : 
method by which Schafhaeutl succeeded in effecting a complete 
* Phil. Magazine, vol. xvi. 
(SHS ha eee 
