78 Scientipic Intelligence. 
Professor Hitchcock gives a brief résumé of the history of Ameri- 
can geological maps, and the special characteristics of each, in 
the following order: Maclure’s, 1817; James Hall’s, 1843; Ly ell’s 
1845 ; Edward Hitcheock’s, 1853; J. Marcou’s, 1853, and again in 
1855; H. D. Rogers, published at Edinburgh, in Keith Johnson's 
Physical Atlas, 1856; Hall & Lesley’s, published in vol. 1 of 
Emory’s Rep. United States and Me ean Boundary Survey, 1857 : ; 
Logan & Hall’s grand map, published 1866, as the Geological 
map of Canada —the only map hitherto published which com- 
pares in style, magnitude and detail with those of European Geo- 
logical Surveys; C. H. Hitchcock and W. P. Blake’s map, in the 
United States publications of the Ninth Census, 1872; C. H. 
Hitchcock’s large map of 1881, published by Julius Bien; McGee's 
map, U. 8. Geol. Survey, of 1885. 
In a note, Professor Hitchcock states that Mr. J. Marcou’s ex- 
tensive ‘‘ Mapoteca Geologica Americana,” published as No. 7 of 
the Bulletins of the U.S. Geological Survey, has an important 
omission, in making no mention of the great Canada map of Logan 
& Hall. The paper states also the reasons of the author for 
disagreeing with the author of the “ Mapoteca” in other respects. 
8. Tertiary Fossils: Geological Survey of Alabama, 1886.— 
This volume contains a Preliminary Report on Tertiary Fossils 
of Alabama and Mississippi, by T. H. Aupricu, and Conétribu- 
tions to the Hocene Paleontology of Alabama and Mississippi, 
by Orro Mryrer.—The former paper is illustrated by six litho- 
graphic plates, and the latter by three. The excellent work of 
Messrs. Aldrich and Meyer is doing much to remove the doubts 
and obscurities connected with the Gulf-border Tertiary fossils. 
Professor E. A. Smith, the State Geologist, opens the volume (of 
60 pages) with a brief account of various str atigraphical sections 
of the Tertiary. In his preface he mentions that “this Bulletin, No. 
1, “is the first contribution toward a work, undertaken by Mr. 
Aldrich, illustrating the paleontology of the Tertiary formation 
of Alabama, and that the work, with its plates and other illustra- 
tions, is to be the g gift from Mr. Aldrich to the State of Alabama. 
Tt will embrace figures and descriptions of all the shells found in 
the Tertiary deposits of the State, and include reproductions of 
the figures already published elsewhere.” “Mr. Aldrich furnishes 
oratuitously not only the text of his article but also provides, at 
his own expense, the entire printed edition of the plates illustrat- 
ing both his own and Dr. Meyev’s articles.” 
9. Geological Survey of Alabama, Eugene A. Suita, Ph.D., 
State Geologist. On the Warrior Coal Field, by H. McCantey, 
Chemist and Assist. Geologist, Montgomery, Ala., 572 pp. Svo, 
1886.—This volume is devoted to a detailed description of the 
principal coal field of Alabama. The number of consecutive beds 
in this extensive coal field is stated to be 35; of which 15 are 
over 24 feet thick and 6 of 4 feet or over. Iti is stated that the 
coal hauls appear to thin toward thenorthwest. An estimate puts 
the amount of available coal in the Warrior coal region from the 
