_ Miscellaneous Bibliography. 439 
ee before that.to Dr. B. F.Shumard. He presents in thi 
any just idea of the geology of the great state. The pamphlet consists 
largely of miscellaneous information on general geology, agricultural 
Geology of the Key of Sombrero, W.Z.; by Avexis A. 
Juten, Assistant in the School of Mines, Columbia College, New York. 
p. 8vo, with se plates. (From m the Annals of the ai of N. York, 
i.)—Mr. Ju 
erals of the ratieheariig coral island Som! rero. This memoir gives a 
evidences of the changes of level and other points connected with the 
deposits of guano we refer to the memoir. 
6. Memoir on the Island of Navassa, W. I.; by Eugene Gavssorn, 
Mining Engineer and Metallurgist, 32 pp. Svo. "Baltimore, 1866, Also, 
The Island of Navassa illustrated—folio, Idem.—The island of Navassa 
is, like Sombrero, an elevated coral eis affo rding 
various views of the island, and making an stag atlas. This island is 
in the Caribbean sea, in 18° 25’ N. and 75° 5’ W., 33 miles southwest 
of Hayti. The greatest height is 300 feet. It has perpendicular cliffs 
of compact coral-made limestone on be sides, and these cliffs are penetra- 
ted, as usual in such cases, numerous caverns. The summit is low oe 
Whether there were successive stages in 5 the elevation 
mains to be ascertained. The change of limestone to phosphate ae 
the presence of guano aoe: is abundantly exemplified in many places 
on this island, as it is on Sombrero. The freshwater of the island the 
author remarks is simply the water of the rains which descends below 
the surface and rests on the —— saltwater; and he observes that in 
digging for water it is important not to go below lowtide level, as the 
water then becomes brackish. In a view he concurs with R. J. Nel- 
son, the author of a memoir on the geology of the Bermudas. The vol- 
um st with analyses of the guano of ae island, 
and its uses, as fertilizer and fuel; by Samus. W. Jounso 
Prof of A on and Agricult. Chem., Yale Col lege. 168 pp. 12mo. a 
beige 1866. (O. Judd & Co.)—This little manual contains more i 
u upon the subject of which it treats than any other work with which 
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