()<) Ihe Aiiiertcaii (Tiohx/fxt. .i.-niimrv, isai^ 
l»laiu'.s of stnitilicatioii, wliere tliese have been jjartially cflaced by 
sultseqiiently induced structures. The structures observed in the 
f^neiss of tlie I lopkiiis-Searles (|uarry indicate thnt one m.-iy easily be 
deceived in apj)lyinff this j)rineipU^." 
Sin)ibir observations by Mr. T. Nelson Dale ( .\m. (iKdi.ui.isr for July, 
1891 ) and Dr. J. K. Wolff show that the apparent strike and dip of the 
metamorphic strata forming large sections of the (Jreen mountain belt 
belong to the snpiM-iiiduced cleavage, while traces of the sedimentary 
bedding Jire inconsjiicuoMS or iiltogether obliterated. 
I'rocirdiiKjx nf tin- Fniirlh Ainnidl .Mrrfmij. hrhl <i/ < 'nl ,i minis, Ohio 
Ih'cciiihrr ..".I, .H), (iinl .11, is:il. IIku.m.w Li: l!<iv KAiucirii,]), Secretary. 
Bulletin, (ieological Society of America, vol. tii, pp. i-xii and 453-541 ;: 
Nov. 9, 1 .S92. 
The report of the conuiiittet' on ])hotograi)hs shows 'M'2 jioiditions- 
during IS91, all by donation, of which 25 are from the Geological Sur- 
vey of Texas ; 51 from that of the United States, including a series of 
26 by I. C. Ivussell, taken during his second expedition to Mt. St. Elias 
and the Malaspina glacier; .31 from the Geological Survey of Canada; 
08 of the Adirondack region, by S. U. Stoddard, of Glens Falls, N. Y. ; 
25 of mountain and canyon scenery in Colorado, by F. 11. ("hapin, of 
Hartford, Conn. ; and 74 of the ^Fuir glacier and its vicinity, by Prof. 
JI. F. Ueid, of Cleveland, O. 
The accuracy of the printing of this \ kIuuu'. and its elaborate index, 
tilling eleven j)ages with double columns in small type, rellect much 
credit upon Mr. \\ .1 IMc(iee, the editor. r>esides the memorial of Dr. 
John Francis \\'illiams. which had been pre])ared for and ])resented 
in the (iKoi.odisr for March. 1S92, this brochure ci>iit;iiiis a luiniber of 
papers, either i-ntire or in abstract. 
EJoiiciitiinj < li'iiliiijii. CuAitLKs J)ii!i), London. Lt)ngmans, Green & 
(!o., 12 mo., pp. 24S. 1S9(). This is a simple text-book for beginners, 
especially adapted to a class of boys who have a teacher to accomi)any 
them on 'excursions. IJeginning with elementary definitions, the 
author gives numerous examples of dynamical geology and passes 
thence through the ganuit of the formations from the .\rcliean to the 
!Meistoc(>ne. It is intended for students resident in (ireat l>ritain. 
Xnrlli A iiii'rii-ii/i (noloi/ji mill I'nli niilnlni/ii. S. .\. Mii.i.KK. Lirst aj)- 
l)endix, extending the pagimition to 71S and the illustrations to 1265. 
Mr. .Miller has included new genera and sjiecies published since the 
appearance of the voltnne about two years ago. The increased volume 
is still sold at •i>5.0(». by the author, Cincinnati, Ohio. 
Mn. (ii:oi!(iK F. I\r\z has also issued an api)endix to his- work. (t'cDts 
<ni(l Pi-i'riniix Slum's iif Aiiirricd, which extends his volume to page 367, 
including, with other additions, an account of diamonds found in Wis- 
consin and in meteorites. 
.1 I'lltli- iiiiiri' liiilil nil till' I'lilli'il Shili's (irulnijii-dl Siirn-i/. .ki.ics M.\ii- 
<'oi, Cambridge, Dec. 1892. In this Mr. Marcou continues his criti- 
<-isin of the methods and the olliciarv of the IJ. S. Survev. 
