Geology and Natural History. 483 
account of the great draft on the energies of the Survey rai 
tal to the recent extension of its field. A genetics ak 
has been noticed in this Journal. The Third Ann sal Report will 
contain a elniaingyy essay, by Mr. Russell, on Take Lahontan, 
and the Fourth, a brief description of the district north of Lake 
Lahontan, where there was a group of smaller lakes. These are 
now in type, and the preparation of the final memoirs is well ad- 
Vol. ViT oF the Geology and beige te Tllinois. 
Ev duae VII of the series of Reports on the Geology and 
Paleontology of Illinois, A. H THEN, State geologist, has 
recently been issued he first part, Mr. ‘then, treats of 
the development of the coal resources of the State since the pub- 
lication of the last volume in 1875, and covers 62 pages. Th 
remainder of the volume, over 300 pages, is paleontological. Over 
Sixty species of fossil fis ker are described by O. St. Jon and 
A. H 
now 196. Two more vo sue Sentai fo str > ie y plates 
each, will op peewee to complete the paleont soey The series 
reports, if bots of pope York are ex 
n the recent formation o sn stals of Cerussite.—M. 
Lacro orx has described the occurrence of several copper minerals 
in connection with pieces of Roman money found among some 
rul e coins, as found, adhered to ss other, 
being cemented ne by | carbonate of copper ; between each 
the degree of alteration whi e coin had 
cerussi in mammillary crystalline groups, of a 
 ntondeemalbeh eg color ; the cuprite formed red cubes up to 1°" i 
distines soa The composition of the coins was 0 tained, as 
follows: Cu 79°76, Pb 16°26, Sn 3°97=99°99. Somewhat similar 
observations have been made by Daubrée on revent minerals 
occurring at Bourbonne-les-Bains, but in the latter case the 
cerussite was formed directly from fragments of lead, and not as 
pled at 1 expense of the lead in the coin alloy. —Bull. Soe. 
in., Vi, 175. 
5. Votunes I and II of the Reports on the Geology of 
Wisconsin have drapes been issued. ey are volumes of grea 
geological i importance. <A notice of them is deferr 
6. Supposed Glacial striw on Locust Mountain, Pa.—On page 
