216 C. M. Warren on the Volatile Hydrocarbons. 
This is accounted for in part by the quantity used for analysis 
: not being more than 07160 grams. ‘The oxygen ratio of the 
_| silica and protoxyds show the composition R, $i, which is that 
of otivine. 
Curbonate of Lime.—The observation of this constituent in a 
meteorite is something entirely new, yet it is found on the ex- 
terior surface of the meteorite in question, in various places. 
here is no doubt in my mind, however, that this ingredient 
was not a part of the mass when it fell, but that it has been ex- 
a to certain conditions since its fall by which carbonate of 
ime has been incrusted on its surface. 
Messrs. D x, Pisani, Daubrée and Cloez discovered 
minute rhombohedral crystals of double carbonates of magnesia 
not separate them in’a manner to poorines as to whether they 
escribed or not. 
_ Arr. XXII— Researches on the Volatile Hydrocarbons; by ©. M: 
| W ARREN,* 
T—Ow tue Isrivesce oF C,H, tron THe Borne ports 1x Ho- 
‘Desdien Sertes or Hyprocarsons, AND IN some SERIES OF THEIR 
geese? ; WITH CRITICAL OBSERVATIONS ON Mernops OF TAKING 
Bultine-pornts. 
as shown by numerous examples, that, as a general rie in 
eon series which are characterized bya poeician elementary 
aheins of C, H, between the members, in the order of the 
. 
* 
* Ann. 
