Geology. 283 
depends on the concentration of the acid whether the extra decomposition 
{ of water accompanies the foregoing products. 
; at an electrolyte differing from the simply binary constitution is 
capable of direct decomposition by the current is thus shown in the case 
of SOs, and even with less room for doubt in the case of anhydrous 
chromic acid, and chromate of potash, as the researches of Prof. Magnus 
prove. 
H. GEOLOGY. 
1. Teeth and Bones of Elephas primogenius, lately found near the 
western fork of White River, in Monroe County, Indiana ; communicated 
by Prof. T. A. Wyire.—On Friday, July 28d, in company. with Prof. . 
Cole, I visited the place where these bones were found. It is situated on 
the farm of Jefferson Wampler, about a mile southeast of the town of 
Gosport. On the 6th of June last, one of the young men, in whose pos- 
session the bones now are, found one of the teeth, which had been washed 
out from the bank y a heavy rain. This led to a further exploration, 
and the discovery of the tusks and teeth and several fragments of the 
skeleton. The bank into which they dug is a stiff plastic bluish clay. 
The bones were found at the depth of eight or nine feet, in a bed of sand 
underlying the clay, all in confusion as if they had drifted there, and had 
afterward been covered with the clay. The sand probably rests om sand- 
stone (Carboniferous) which forms the bottom of the brook not many 
yards distant. Several of the larger bones were so far decayed that they 
crumbled on attempting to take them out. 
sq - Richardson, whom the discovery of these remains was 
__ Made, deserve credit for the care they have taken in disinterring and pre- 
6 serving them. 
| _ The bones consist of two tusks, four molar teeth, and several frag- 
me ments, viz, a piece of a rib, am end of the radius (?) much worn, measur- 
y=: 2g about seven inches across its concave sarface, and a few spongy por- 
og tions of the larger bones, : 
_ _ One of the tusks measures on the outside of the curvature eight feet, 
ju ing from the a arance of the fracture, this might have been lost 
before the death of the animal. It measures five feet in length, and in 
- diameter is the same as the other. The weight of the larger tusk is 166 
_ There are four molar teeth, two larger i and two smaller. The largest 
Measures, in the longer diagonal from crown to base, eleven inches; ver- 
