94 llie American Geolocjlst. August, 1897 
Boston Jour. Nat. Hist., v, 1S')0. 
Anhydrous prehnite. Analysed Jaeksonite, Whitney, and found the 
same percentage of water as in prehnite. Al)8tract in Amer. Jour. Sei., 
X. 1850, p. 121. 
Pi'oc. Boston Soc. Nat. Hist., Hi, 1851. 
Remarks on the exemption of the primary formations from cholera, 
pp. 168-161). C more likely to occur on recent and tertiary rocks owing 
to the character of the water drunk. 
The mirage of lake Superiorof the months of July and August, 1847, 
p. 169. 
Remarks on a calamite from Bridgewater, Mass., p. 223. 
Remarks on salt and carbonate of soda from the west, pp. 223-224. 
Analysis of water from a hot spring in the region of the Great Salt 
lake, p. 224. Reprinted in Amer. Jour. Sci., x, 1850, p. 134. 
Remarks on the plumbaginous mica slates of Vermont, p. 224. 
Remarks on Foster and Hill's opinion as to the age of the lake Super- 
ior sandstone, p. 228. 
Eulogium upon Dr. Martin Gray; p. 231. By title only. 
Analyses of three samples of white cast iron, pp. 232 235. 
Remarks on the desiraVjility of examining a sandstone in the quarry, 
p. 241. Best test for resistance to weathei-. 
Analysis and description of Vermiculite from Millbury, Mass., pp. 
243-245. Analysis by Richai'd Crosseley. 
On a mineral named Jacksonite, pp. 247-248. '-The purport of the pa- 
per was to show that Jacksonite is not a new mineral. . . . Mr. Whitney 
being present, stated that he had full confidence in the results of his 
own examination of the mineral in question, and he must still consider 
it a new mineral." J. D. Dana accepts Jackson's criticism. 
Remarks on Prof. Rogers' theorv to account for the origin of the green 
sand of New Jersey, p. 249. "The process would be similar to that of 
the drying of French green.'" 
Suggestion that bog iron ore comVjined with lime would be of agricul- 
tural use, p. 257. 
Remarks on an Aztec skull from Mexico, p. 260. 
Analyses of Algerite by Mr. Crosseley, pp. 278-279. 
Description and analysis of asphaltum recently discovered in New 
Brunswick, pp. 279-280. Asphaltum from Dorchester, N. B. 
Remarks on artificial minerals from slags of an iron furnace in Penn- 
sylvania, p. 282. Also in Proc. Amer. Assoc. Adv. Sci. 
Remarks on the change of level of lake Superior, p. 292. 
Description and analysis of Tellurium ore from Whitehall, Va., pp. 
297-299. Also in Proc. Amer. Assoc. Adv. Sci. 
Observations upon the solution of lead and tin by Cochituate water, 
p. 299. 
Remarks on iron ore from the Allegheny river in Penn., p. 319. 
Remarks on the effect of concentrated sulphuric acid on minute algae 
and spores, p. 320. 
Remarks on tertiary deposits in Duxbury, Mass., pp. 323-324, p. 329. 
