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ADVERTISEMENTS. 
c aulae 
The American Geologist for 1891, 
EDITED BY 
Pror. S. Catvix, University of Iow Dr. Crayrote, Buchtel College; Jons Everman, Lafayette pin 
Dr. Perstror Frazer, mahal "Institute: ye F. W. CRAGIN, ee rn College; Pror. C. L. Hex 
Cincinnati fy eae Pror. A. LAKES, Colorado School ——— ; Dr. NDREW C. Lawson, pa 
Geologica l Survey of Canada; E. 0. ‘Unaicn, Illinois Geolog at arias Pror. I. C. WaITE, 
Un niversity of — Virginia; Dr ALEX. WINCHELL, University Oe Michigan ; 
F. N. H. Wincue.t, University of Minneso’ 
SPECIAL OFFERS TO NEW SUBSCRIBERS. 
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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 paue 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 GEoLocisT 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. 
Geology and Paleontology. By S. A. MILLER. Recently 
orth American 
published ; 664 pp., Royal octavo, 1194 illustrations. Regular price, 
with the Ganoaisk for 1891, $7. ; 
Rand & MoNally’s Standard Atlas of the wort One large volume of 
196 pp, elegantly pusireiet, substantially bound, with gold side 
stamp, revised ndispensable to every student. Size of 
atlas Siena, 11x14 a Regular peee e English cloth bind- 
ing, $4.50. With the GeoLoeIst for 1891, $5.00 
tes; or a Demonstration of the NeR a of Man before 
A study of their condition, antiquity, racial ainities and progress- 
ive dispersion over the earth. With char other illustrations. 
By ALEXANDER WincHELL, LL.D. 3d ed., r as = cloth. Reg- 
-ular price, $3.50; with thee ‘GEOLOGIST for 1891, 
World Life. A study of the formation, growth eg fee of worlds, 
from their earliest existence as nebulous masses diffused through 
space to e: development in sun and world systems, and their final 
dissolution. By ALEXANDER WINCHELL, LL.D., 1 vol., illustrated 
— cloth. Regular price, $2.50; with the GroLocist for 1891, 
Sparks from a Geologist’s Hammer. series of geological B 
. ogical essays. ig 
ALEXANDER ope agg LL. D. Second edition, illustrated, 12m 
we] price, $2.00; with the GEOLOGIST for 1891, -00. 
Leibnitz ew Essays Concerning g the Human Understanding A critical 
realy By Pror. Joun Dewey, Px. D. 16mo, 2 pp. Regu- 
price, $1.25; with the GEOLOGIST ‘tor 1891, $3.75. 
