PUBLICATIONS OF THE GEOLOGICAL SOCIETY OF AMERICA 
REGULAR PUBLICATIONS 
The Society issues a single serial octavo publication entitled BULLETIN OF THE 
GroLoaicAL Sociery or AMreriIcA. ‘This serialis made up of proceedings and memoirs, 
the former embracing the records of meetings, with abstracts and short papers, list 
of Fellows, etcetera, and the latter embracing larger papers accepted for publica- 
tion. The matter is issued as rapidly as practicable, in covered brochures, which 
are at once distributed to Fellows and to such exchanges and subscribers as desire 
the brochure form of distribution. The brochures are arranged for binding in 
annual volumes, which are elaborately indexed. To this date eight volumes have 
been published. 
Tue Bunwetin is sold to Fellows of the Society and to the public either in sepa- 
rate brochures or in complete (unbound) volumes. The prices are as follows: To 
libraries and to persons residing outside of North America, five dollars ($5.00) per 
volume; to persons in North America, not Fellows of the Society, ten dollars 
($10.00) per volume (the same amount as the annual dues of the Fellows) ; to Fel- 
lows of the Society, a variable amount, depending on the cost of publication. 
These prices cover cost of transmission to all parts of the globe. No reduction is 
made to dealers. Subscribers should specify whether they desire the brochures or 
the completed volume. Orders should be addressed to the Secretary, and drafts 
and money orders made payable to the Secretary of the Geological Society of America, 
Rochester, New York. 
DESCRIPTION OF THE PUBLISHED VOLUMES 
VoLUMES. PAGES. Prares. Freurrs. Price 10 FELLows. 
Yo, il, 1800.5 oe ae eenee see 5938 + xii 13 51 $4.50 
Wol. 2, ISOs coeboosobeueooadoy eames 662 + xiv 23 63 4.50 
WOllo B; WIV oo Sos cm coun eo renaIe 0 o41 + xi 17 72 4.00 
Wol. 4, USO2. (ce decean Scoot ce tnasmrEes 458 + xi 10 99 3.50 
Wl, ©, ISSBoseeeecenn sae AS Ge SEeaeene 665 + xii 21 43 4.00 
Wl, ©, S92. tessog susoosecode Feo OS Se Sk 27 40 4.00 
Wools 75 UGB) a eee 558 + x 24 61 4.00 
Woll, 8; WE@Gs.cctoeeleecouocs 7as0gbEDE 446 -- x ol 29 4.00 
Voll, ©, USO, ax0nc0 eameueue UONpmOOS 460 + x 28) ° 49 4.00. 
BrocHuRES OF VOLUME 9 
Brocuures. Paces. Puaves. Freures. ICED aeoRIGE Hh 
Proceedings of the Ninth Summer Meet- 
ing, held at Detroit, Michigan, Au- 
gust 10, 1897. H. L. Farrcninp, Sec- 
PADI 4c 506 6c Sols tn RR end ORS Oe eNO Ri eettie Cai DOPOD $0.30 
Great changes of level in Mexico and 
the interoceanic connections. J. W. 
SIBEIN GEIR eecristeialscieiaieiracrs Sate eee ee oleae 1-5 1e6 45 -90 
Clay-veins vertically intersecting Coal 
Measures. W.S. GRESLHY........... 30-08) eas. J=27 .80 .60 
(vii) 
Ti—Butn. Grov. Soc. Am., Vor. 9, 1897 
