ADVERTISEMENTS. 
Words; their Use and Abuse. By Wm. Matuews, LL.D. Twentieth 
edi ition n, ae cloth, 504 pp. Regular price, 92. 00; with the GEOL- 
OGIST for $4.00 
Siar: nye ay Things. y Wm. Matuews, LL.D. Third edition, 1 
12mo., 394 pp. painde price, $1. 50; with the GEOLOGIST for 
a. $3.75. 
Shall We Teach ehar! By ALEXANDER WINCHELL, LL.D. Should 
be read by all teachers and those interested in educatio nal matters. 
12mo., cloth. Regular price, $1.00; with the GEOLOGIST for 1891, 
$3.50. 
eg nf Works; c complete set in twelve volumes; with the GEOLOGIST 
Mammoth “Opal riot = Ei piane 2176 pp., 620 illustrations; with 
e GEOLOGIST for 1, $4. 
ae and Precious stones of Ne rth America. By GEORGE F. Kun 
Large quarto, pp. 336, 8 colored plates and numerous minor ‘daerey! 
tok ape gilt. Regular price, $10.00; with the GEOLOGIST for 
The Metallurgy of Steel. By Henry M. Howe. “A notable perc 
o the literature of iron and steel deha a ri ” Roya arto, 
ip 5 te ., Cloth, gilt, pe an nampan Regular price, $10. 00; 
with the GEOLOGIST for 
Modern American Methods a copper siik R. E. D. 
Second edition, large 8vo., 342 , illustrated. es Coreen price, $4. 00; 
with the GEOLOGIST for 1891, 
an Accidents and their Prevention on. By SIR FREDERICK A. ABE 
ith the laws governing coal mining in every state and territory m 
the United States, and those of Great ERE and Prussia, never 
before ERP in pee A form. Large 8vo., pp-420, cloth. Reg- 
ular price, $4.00; with the GEOLOGIST SA 1891, "$6. 00. 
America Not ‘tities by Columbus. À pions dens of the dis 
covery of America by the Norsemen in the tent th cen By R. B. 
AN post son, A. M. 3d edition enlarged, 12mo., cloth. erais price, 
$1.00; with the GEoLoGIsT for 1 
teology, , aes Ae eran snd Strstigraphioal. By JOSEPH PREST- 
ov wi 
Vol. I k eka sin ay PER Drok TE S site orree and Phys- 
ical. Regular price for both volumes, $15 With the GEOLOGIST 
for 1891, $15.50. [See the advertisement of Mice ilian & Co. in 
oe IST. 
two yale to the mile. Sheets are 23 = e inches, the atlas being 
173 x 23 inches. Regular price, $20. h the GeEoLoGIsT for 1891, 
$20. [See advertisement of Julius Bien oe Cb., in the GEOLOGIST. ] 
For these premiums money must be sent in advance, and in 
-ee cases by postal order or note, or by express or draft on New 
For public libraries this affords a rare a seas to procure 
standard works at reduced prices. We desire to extend the 
Gxotoarsr to all scientific libraries and laboratories. Our sub- 
ein list is steadily increasing, and with the year 1891, which 
call attention to Ga offers for 1891. 
THE AMERICAN GEOLOGIST, 
SEPT. 18, 1890. APOLIS, MINN. 
