Recent Publications. 197 
Jour, of Geol., Vol. 1, No. 7, Oct.-Nov., 1893, contains: Geologic time 
as indicated by the sedimentary rocks of North America, C. D. Walcott; 
On the Origin of the Pennsylvania authracite, .J. J. Stevenson; The 
basic massive rocks of the Lake Superior region, W. S. Bayley; On the 
geological structure of the Mount Washington mass of the Taconic 
range, W. H. Hobbs. 
Jour, of Geol., Vol. 1, No. 8, Nov.-Dec. 1893, contains: The supposed 
.glaciation of Brazil, J. C. Branner; Causes of magmatic differentiation, 
Helge Backstrom; The geological structure of the Housatonic vailey 
lying east of Mount Washington, W. H. Hobbs; The Newtonville sand- 
plain, F. P. Gulliver; The structures, origin and nomenclature of the 
•acid volcanic rocks of South Mountain, F. Bascom; Studies for Students 
— -Genetic relationships among igneous rocks, J. P. Iddings. 
IV. Excerpts and Individual Publications. 
Annual report of the St. Louis Public Library, F. M . Crunden, 1891-92. 
On the nature of the chemical elements: The distribution of the 
atomic weight, C. S. Palmer. Extr. Proc. Colo. Scien. Soc, Nov., 1893. 
Notes on some fossil plants from the Trinity division of the Coman- 
che series of Texas, W. M. Fontaine. Proc. U. S. Nat'l Mus., Vol. 16, 
No. 934. 
A basic dike in the Connecticut Triassic, L. S. Griswold. Bull. Mus. 
<Comp. Zool., Harvard College, Vol. 16, No. 14. (Geol. Series, Vol. 2.) 
Petrography of the gneisses of the town of Gouverneur, N. Y., C. H. 
Smyth, Jr. Contr. Geol. Dept. Columbia College, No. 11. 
Production of coal in 1892; E. W. Parker. From Report of Statistics, 
1892. 
A preliminary report on the Cretaceous and Tertiary formations of 
New Jersey, W. B. Clark. From the Geol. Survey Report, New Jersey, 
1892. 
The great Mesozoic fault in New Jersey, B. S. Lyman. Proc. Am. 
Phil. Soc, vol. 31, No. 142, Sept., 1893. 
The Cretaceous system in Canada, J. F. Whiteaves. Presidential ad- 
dress. Trans. Roy. Soc. Can., Section 4, 1893. 
The future of silver, Eduard Suess. Translated by R. Stein, U. S. 
•Geol. Survey, 1893. 
On the Thoracic lega of Triarthrus, C. E. Beecher. Amer. Jour. Sci., 
vol.46, Dec, 1893. 
The recent discovery of large Unio-like shells in the coal measures at 
the South Joggins, N. S., J. F. Whiteaves. Trans. Roy. Soc Can ., Sec- 
tion*, 1893. 
The geology of Nashville and immediate vicinity, P. M. Jones. 
Geological map and table of economic resources of Illinois. I). W. 
Mead. Notes on the hydro-geology of Illinois in relation to its water 
supplies, D. W. Mead. 
Natural science at the Chicago exhibition, F. A. Bather. Natural 
•Science, Vol. 8, No. 21, Nov., 1893. 
Nickel: Historical sketch, W. L. Austin. Read before the Colorado 
•Scientific Society ,'Dec 4, 1893; 26 pages. 
