ADVERTISEMENTS 
The American Geologist for 1891, 
EDITED BY 
Pror. S. Catvin, ve ho . E. W. Cravrotr, Buchtel College; Joun Everman, Lafayette College ; 
Dr. Perstror Feraz niin “ihanaee, Pror. F. W. Craern, pea gy Be F. C. L, HERRICK, 
Cincinnati UEN, Pror. A. LAKES, Colorado School of Mines; De. . Lawson, late 
Geologica 
patdi of Canada; E. 0. ‘Unarcn, Illinois Geo a Be g tae a eS LC. Warre, 
Uni of West Virginia; Dr. ALEX. Wiwenect, University of Michigau 
Pror. N. H. WixcwerL, University of Min. nesota, 
SPECIAL OFFERS TO NEW SUBSCRIBERS. 
For the year 1891 the subscription rate for the GEoLocist 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 Gronoaist at a considerably less rate than 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. 
y 
piae begs 3d oe pect ge 9 A illustrations. paier 
$5.00; with the Hp llenelnd for 1891, $7. 
Rand & McNally’s Standard Atlas of the World, One large volume 0 of 
196 pp, elegantly illustrated, substantially bound, with gold side 
stamp, revised to 1890. Indispensable to every aden" Size of 
atlas closed, 11x14 inches. Regular ee best English cloth bind- 
ing, $4.50. With the Gro.oaist for 189 
Adamites; or a Demonstra’ of Man 
A study of ‘their condition, antiquity, racial affinities and progress- 
ive dispersion over the e arth. With charts and other a lnstrations. 
ALEXANDER WINCHELL, LL.D. 3d ed., 1 vol., aa clo Reg- 
ular price, $3. on ig ares for 1891, $4.7 
Sparks from a Goclogist's Hammer, A series of geological essays. BY — 
ALEXANDER WINCHELL, LL.D. Second edition, illustrated, 12m0- 
Regular price, $2.00; with the Grotoaisr for 1891, $4.00. i eriteal 
Leibnitz’ New Essa Concerning the Human Understan 
exposition. Be i Pror. Joun Dewey, Pu. D. 16mo, 289 pp. Regu 
lar price, $1.25; with the GEOLOGIST for 1891, $3.75. 
peli $e auaaaaaaŘħħĂ 
