50 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, Lbull. 135. 
234 Hall (James). [Correlation of clastic rocks. J 
Int. Cong. Geol., Compte Rendu, 5th session, p. 170 (\ p.). 
Remarks ou the importance of considering both physical and faunal 
characters and the unequal value of fossils in the correlating of rocks. 
235 and Clarke (J. M.). Paleontology of New York, vol. viii, 
pt. 2. 
N. Y. State Mus., 47th Ann. Rept., pp. 797-851. 
Includes a synopsis of contents of vol. viii, pt. ii, and a summary 
of "The evolution of the genera of the Paleozoic Brachiopoda" and 
description of new species figured in the same volume. 
230 An introduction to the study of the Brachiopoda, in- 
tended as a handbook for the use of students. Part II. 
N. Y. State Mus., 47th Ann. Rept., pp. 945-1137. 
Continues the description of genera began in part i, discusses the 
evolution and classification of the genera of the Brachiopoda, and 
gives a table of classification and an alphabetical index to genera and 
subgenera of the Brachiopoda. 
236(t An introduction to the study of the genera of Paleo- 
zoic Brachiopoda, vol. viii, part ii, fascicle i. 
Abstracts: Am. Jour. Sci. ; 3d ser., A r ol. xlvii, p. 319 (i p.) ; Am. Jour. 
Sci., 3d ser., vol. xlviii, pp. 71-72. 
Noticed in Bibliography and Index for 1892 and 1893. 
237 Hallock (William). Note on further observations of temperature 
in the deep well at Wheeling, W. Va. 
Abstract: Am. Assoc. Adv. Sci., Proo., vol. xlii, pp. 173-175. 
In tabular form shows the temperature of the water which had 
leaked into the well to a depth of 3,196 feet. 
238 Halse (Edward). Notes on some gold-bearing veins of Zacatecas, 
Mexico. 
Eng. and Mg. Jour., vol. lviii, p. 78 and pp. 105-107. 
Notes on the vein structure and character of the ore. 
239 Gold in Zacatecas, Mexico. 
Eng. and Mg. Jour., vol. lviii, pp. 605-606. 
Brief description of the ore deposits. 
210 Harrington (B. J.). The composition of limestones and dolomites 
from a number of geological horizons in Canada. 
Can. Rec. Sci., vol. vi, pp. 27-32. 
Gives the chemical composition of Cambrian, Silurian, Carbonifer- 
ous, and Triassic limestones from different localities of Canada. 
211 On nepheline, sodalite, and orthoclase from the nepheline sye- 
nite of Dungannon, Hastings County, Ontario. 
Am. Jour. Sci., 3d ser., vol. xlviii, pp. 16-18. 
Abstract : Am. Geol., vol. xiv, p. 68 (5 1.). 
Describes the chemical composition of the minerals mentioned. 
