si tly = 
ae 
ADVERTISEMENTS. 
Worta: eae Use and Abuse. uy Wn. Matuews, LL.D. Twentieth 
, 12mo., ki e 504 pp. Regular price, $2.00; with the GEOL- 
ost ‘fo wi 
cere bac and eae By Wa. Matuews, LL.D. Third edition, 1 
we et 394 pp. Regular price, $1.50; with the GEOLOGIST for 
pet 3.7 
aa We Teach Geology? By ALEXANDER WINCHELL, LL. D. Should 
d by all teachers and those interested in educational matters. 
12m cloth. Regular price, $1.00; with the GEoLOGIsST for 1891, 
Dickens Works; complete set in twelve volumes; with the GEOLOGIST 
4.00. 
Mammoth re opeedia, F Beste ee 2176 pp., 620 illustrations; with 
e GEOLOGIST for 1, $4. 
ig and Precious Stones of North America, By GEORGE F. Kunz. 
arge quarto, pp. 336, 8 colored plates and numerous minor engrav- 
tes arte gilt. Dacula price, $10.00; with the GEOLOGIST for 
1.00. 
The Metallur urgy of Steel. By Henry M. Howe. “A notable conribu- 
tion to the literature of iron and steel metallurgy. 2 Roya quarto, 
425 pp., cloth, gilt, ora illustrated. Regular price, $10.00; 
with the GEOLOGIST for 1891 
Modern American Methods of vehi er Smelting. By Dr. E. D. PETERS 
Second edition, large 8vo., Stagg pp., illustrated. Rogulae price, $4.00; 
with the GEOLOGIST for 1 00. 
Mining Accide: se By SIR FREDERICK A. ABE 
ith the laws governing coal mining in every state and territory i 
the United States, and those = pii pa acm and Prussia, never 
before collected in haan ti = pp-4 420, cloth. Reg- 
ular price, $4.00; with the krapat sti pe -00 
America Not Discovered ty Ost A historical PAR of the dis 
hts of America a the Norsemen in the tenth century. B. 
RsoN, A. M. 3d edition enlarged, 12mo., cloth. Regular price, 
$1. 00: with the Groroorst for 1891, $3.75. 
, Chemi and Stratigraphical. SEPH PREST- 
WICH, M. dah RS. FGS In Bn ae with puras 
MER iy ee gn and Physical. a, ys- 
Depune m for both volum en, $15. oS. With tise Grorocrsr 
for 1891, $15.50. [See the advertisement of Macmillan & Co. in t 
EOLOGIST. | 
Bier’ s Atlas of the Metropolitan District and Adjacent Country. Unr 
valled as a specimen of the map-maker’s art. Just errati brs 
two inches to the mile. TAS are 23 x 35 inches, the atlas being 
1724 x 23 inches Regular p ice, $20. With the GroLoeist for 1891, 
$20. [See advertisement of J ulius Bien & Co., in the GroLoeisT.] 
For these premiums money must be sent in advance, and in 
all am by postal order or note, or by express or draft on New 
Yor 
ork. 
For public libraries this affords a rare opportunity to procure 
ur su 
scription list is steadily increasing, and with the year 1891, which 
will be memorable in the history of American geology, because of 
the American session of the International Congress of Geologists, 
we expect to see it doubled. We hope our old subscribers, to 
whom we acknowledge our hig T for numerous favors, will 
= attention to these offers for 1891. 
THE AMERICAN —— 
SEPT. 18, 1890. MINY. 
