Geology and Natural History. 419 
other es unless the acid spring of the Paramor de Ruiz, in 
New anada, be an exception, examined b wy, who does not 
“i pr he oa how much of the very large aati of sulphuric acid 
is uncombined with bases. The water of the Rio Vinagre, 
gi npeaiesy a Sewn Tale from North Carolina ; by Mr. 
Apvexr, of the Laboratory of the University of Virginia. 
(Chemical News, No. 654.)\—Among the minerals referred to 
there was a very beautiful “soapstone, from the Nantahela Moun- 
tains, 8 miles from the mouth of Nantahela River, Swayne Co. 
{formerly Cherokee Co.), N. C.” It had been sawn _ slabs -d 
about 14 inches thick, was very uniform in character, compac 
with indistinct traces of foliated siaceture, white with a faint ay 
ish shade, lustre pearly, streak white, moderately Se greasy 
to the touch, hardness = about 1 1°25, sp. gr. == 2°82. Itr sembled 
nephrite. Analysis afforded: Silica 57-72, magnesia 33°76, alu- 
mina 2°52, iron — gee: so a 60110065 
If the silica, magnesia, and w lone be considered, the 
+iH, numbers ac EE resid re re the formula (SMO 
O),S 
The 6h ss gp is obviously oni from the foliated tale from 
Webster, Jackson Co., N. C., analyzed by Genth — Jour., I, 
q 3). 
In the latter “ per cent of nickel oxide was foand, and but 0°34 
per cent of wate 
In the aaaceak now described there is no nickel. 
ae) of Virginia, March 12, 1872. 
Leucite.—Prof. vom Rath, the excellent e Ahern Stel Sond sf 
ons. has found, through the examination of a twi crystal, a: 
Well as by méastroutent that the crystals of Pesog instead of 
son aera! trapezohedrons, are really tetragon 
he occurrence in recent Pine timber of oe te 
hy trocarbon hitherto known only in a fossil state; by W. 
ALLET, Ph.D. (Proc, Brit. Assoc., 1872.)—Some nearly colorless 
crystalline crusts, found in clefts between the 
und to agree 
ecu i in physical and chemical properties with the fichtelite of 
romeis and Clark, and on seabyeia yielded— 
ar n f * of of oe 7* 87°8 
ae Cioticiets 
Hydrogen 
in og with the foemnlar 2(C, H 3 The fusing-point was found 
