AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[SECOND SERIES.] 
Arr. XVIII.— Contributions to the Chemical at Geological Ais- 
tory of Bitumens, and re spite or Bituminous Shales ;* by 
z ae y Hunt, MA, FR. S.; of the UA Survey of 
a 
Pitch. ‘The related substances guayaquillite and berengelite, and 
the en. tance known as es (ake from the modes of their 
ence to have a similar origin to asphalt, and thus to be 
date, from fossil resins. The characters of fusibility and sol- 
adie in liquids like benzole and sulphuret of an serve to 
‘stinguish the solid bitumens from coal and som matters 
sone st 1, 1862. 
3 me of aan a wre given inthis pa roniat s already appeared in 
cle by me, entitled Notes on Aggies iutery of F tearrints ied appeared in 
ince 
* ti 
sis was : : hists, but i 
generally tho to be found in the Devonian pyroschists, in pind 
anc 28 fssiliferons = oak had shown the rela ation of the oil springs to 
Gazette of | coltgee of my lecture before the Board of Montreal 
AM. Jour. Scr, —Szconp Series, Vor. XXXV, No. 104.—Marcu, 1863. 
21 
