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The American Geologist for 1891. 
EDITED. BY 
Pror. S. Catvry, University of Iowa ; E. W. Crayrote, Buchtel College; Jonn Everman, Lafayette College ; 
Dr. Perstror orai ranklin Insite; Pror. F. W. CRAGIN, ie pai College ; Pror. C. L. HE ERICK, 
Cincinnati University; Pror. A. LAKES, Colorado School of Mi ines; Dr. Anprew C. Lawson, late 
Geological Survey of Canada; E. O. Veer, Page son sat Survey Pror. I. C. on 
University of West Virginia; Dr. L, Un = y of Michigan 
Pror Cac A a Ueivs TA Mie Sis. 

SPECIAL OFFERS TO NEW SUBSCRIBERS. 

For the year 1891 the subscription rate for the GEoLoGIsT will 
remain at $3.50. Any old subscriber who remits that sum with 
the name of a new subscriber will be entitled to have his own sub- 
scription extended six months. The cost of the numbers for 1888, 
after January 1st, 1891, will be $3.50; those of 1889, $2.50, and 
of 1890, $2.50. New subscribers who remit to us cash in advance 
will receive all back numbers and the subscription for 1891, for 
$11.00, but this will debar them from the privilege of the follow- 
ing premiums. 
Any new subscriber who remits to us cash in advance may select 
from the following premium list, by which he will receive the se- 
lected book and the GEOLOGIST at a considerably less rate thán he 
could obtain both separately. These are special offers for this 
specific purpose, for which we have made favorable arrangements 
with the various publishers. The works here listed are such as 
every geologist would desire to have in his library. 
North American Urge ad and Paleontology. S. A. MILLER. Recently 
published ; , Royal eino ye illustrations Regular price, 
$5. 00; with the biban for $7. 
1, 
Rand & McNally’s Standard Atlas oft the World. One large volume of 
196 pp, nian riod illustrated, esearch bound, i gold side 
stamp, revised to 1890. In sable to every student. Size of 
atlas pitch 11 a 14 inches. Re se alee fh pon ge English cloth bind- 
, $4.50. With the Ukoro for 1891, $5.00 : 
Adamites or niptiy of the Existence of Man before Adam. 3 
A study of their condition, antiquity, racial affinities and progress- a 
ive dispersion over the earth. ith charts and other illustrations. 
By ALEXANDER hfe cette LL. D. 3d ed., 1 vol., 8vo, cloth. Reg- i 
ular price, $3.50; with the GroLogist for 1891, $4.75 
World Life. A study g the formation, growth and decay of worlds, 
from their earliest existence as nebulous masses diffused through 
space to their development in sun "a world systems, and their final 
dissolution. y ALEXANDER WINCHELL, LL.D., 1 vol., illustrated 
ae e$ cloth. Regular price, $2. 50; with the Gaora for 1891, 
“Ee 

Sparks from a Geologist’s Hammer., A series of geological essays. By 
ALEXANDER WINCHELL, LL Second edition, illustrated, 12mo. 
Regular price, $2.00; with ai GEOLOGIST for 1891, $4.00. 
Leibnitz’ New Essays Concerning the Human Understanding A critical 
exposition. By ProF. Joun Dewey, Pu. D. got 289 pp. Regu- 
lar price, $1.25; with the GEOLOGIST ‘for 1891, $3.7 

