Reviczv of Recent Geological Literature. 323 
•emanating from Yale, and occasional comments and footnotes by the 
editors intended to elucidate the corrections and discrepancies which 
lapse of time has rendered apparent. Ihe work issues and is edited 
from New Haven, is published by firms in New York and London, 
and is printed at Cambridge, Mass., a fact that indicates not only the 
cosmopolitan spirit in which it is published, but the cordiality exist- 
ing between the old university towns of New England. 
Probably no greater service could be rendered to American miner- 
alogy and petrography than that which is served by this publication. 
By all odds Yale has been the American head center of these sciences, 
and this volume will serve to perpetuate that leadership. These pa- 
pers are gathered mainly from the American Journal of Science, the 
earliest being that of Brush, published in 1849, but some are from 
other sources. The volume is one of a series that have been prepared 
by the professors to commemorate the bicentennial of Yale univer- 
sity, dedicated to "The Graduates of the University." 
N. H. w. 
Dragons of the Air. H. G. Seelev. Methuen & Co., London, and D. 
Appleton and Company, New York, igoi. 12 mo. pp. 240, with 
eighty illustrations. Price $1.20. 
This little work, which is small only in respect of material bulk, 
treats of one of the curious traits, one might almost say freaks, of the 
animal kingdom, viz. that of extinct flying reptiles. It has several 
plates showing the grotesque forms oi the ornithosaurs, both in fly- 
ing action and in repose on the earth, or walking. There is an open- 
ing chapter which is both mythological and anatomical, treating of 
all animals that fly or that have been believed to fly, fishes, frogs, liz- 
ards, birds, and mammals, including man. The volume is historico- 
scientifico-popular, very interesting and instructive, and should be in 
the library of every teaching geologist. x. h. w. 
Preliminary report on tlie Copper-bearing rocks of Douglas county, 
IVisconsin, containing a preliminary report on the copper-bearing 
rocks of parts of Washburn and Bayticld counties. \J. S. GR.^N^■. 
(Wisconsin Geological Survey, Bulletin No. 6. second edition. 
1901.) 
Dr. Grant has given two vacation seasons to the field work on 
which this report is based. He has described in much more detail the 
same structure and field facts, and reaches, in the main, the same re- 
sults as were announced in the Wisconsin reports, published in the 
seventies. In two important respects, however, he differs from those 
reports, viz. (i) He is not so sanguine of the existence of copper 
of economic value in northern Wisconsin as was Irving, and (2) he 
describes as a fault plane the breccia and the attendant features that 
mark the contact of the lake Superior sandstone on the trap all along 
the north side of the Douglas range, making it the probable western 
duplication or extension of the fault plane seen along the south side 
•of Keweenaw point in Michigan. 
