Chemistry and Physics. 251 
menhdden. The crude hydrocarbons thus obtained were ee ina os 
process of fractional condensation ; indicating by this name, all those hy- 
drocarbons which passed the hot condenser at 220°C. By repeated dis- 
tillations of this sort, occupying nearly a year, sixteen bodies of constant 
iling point were obtained, belonging to several series, To the hydrid 
series (€, Hono) the a of amyl, caproyl, enanthyl and capryt; to 
(€,H,,-¢) benzole, toluole, xylole, isocumole. 23°5 per cent consisted of 
isocumole and rutylene; 13°3 per cent of xylole; 12°5 per cent of cap- 
rylene and hydrid of capryl and 10°2 per cent of margarylene. The 
importance of this research in “relation to the geological ae * 
Nes ae is at once evident.— Mem. Am. Acad., new seri ri 
a from Rangoon petro ole m.— WARREN an Siomn commu- 
material in their hands, they as halle results as ans art com- 
rs and even in meteorites be account ted for? Without eeagie 
to decide the matter, he thinks it of interest to show, from his recent 
researches, how such compounds could be formed from purely inorganie 
materials, If vse eo that the alkaline metals may exist in the earth’s 
€,€a+(H,0),—6€,H,+€aH @,: but under the conditions of pres- 
Sure and temperature there existing, the acetylene would at once be con- 
densed, forming the benzole series ; (€,H,),=—€,H, or benzole. But 
from the action of steam upon the alkaline metals, hydrogen would be 
heather and this hydrogen, being condensed with the acetylene, woul 
prod ee t the ethylene series (©,H,+H,—€,H,); or even the hydrid 
€,H,+H,—€,H ethylic hydiid), = _ which series occur in 
natural hydrocarbons: “We can thus conceive the production ee a 
purely mineral method of all the natural rears arbons. The inte 
tion of farses bene and alkaline metals,—lastly the tendency of dhe eae car- 
te together so as to form matters more more condensed, suffice 
