190 The American Geologist. Soptomber, i896 
The National Cydopoidia. of Anu'rican Biographt/. (New York: 
James T. White & Co., 189;}-9().) In the six volumes, each containing 
about 530 pages, ah-eady pubUshed of this work, biographical sketches, 
with portraits, of many geologists and paleontologists (jf the past and 
present time are found, including Louis and Alexander Agaseiz, George 
H. Cook, James D. and E. S. Dana, Amos Eaton, Persifor Frazer, Ai'- 
nold Hague, James Hall, Edward Hitchcock. T. Sterry Hunt. Alpheus 
Hyatt, Charles T. Jackson, Joseph Leidy, Henry Carvill Lewis, J. W. 
Powell, Raphael Pumpelly, Samuel H. Scudder, Eugene A. Smith, 
Charles A. White, Alexander Winchell, and Amos H. Worthen. It is 
planned to continue the work to a total of twelve volumes. w. u, 
Su7' un Ci-istal de Labrador da Gabbro de Minnesota. By N. H. 
Winchell. (Bull. d. 1. Soc. Franc, d. Min., t. 19, pp. 90-92, 1896.) A 
huge porphyritic crystal of plagioclase frotn the anorthosyte of Beaver 
Bay, on the north shore of lake Superior, is described and figured. This 
crystal is the largest porphyritic labradorite, on which good crystal 
faces occur, that has been recorded. It is a Carlsliad twin of tabular 
form and is 67.2 mm. across and 15.25 mm. in thickness. The forms 
which occur are listed and an analysis is given, which shows the feld- 
spar to be between AVj^ An., and Abj An.j or labradorite-bytownite. 
u. s. G. 
RECENT PUBLICATIONS. 
/. Governinent and State Repo)-iti. 
15th (1893-'91) Ann. Rept. U. S. Geol. Surv., xiv and 755 pp., 48 pis., 
1895. Preliminary paper on the geology of the common roads of the 
United States, N. S. Shaler: The Potomac formation, L. F. Ward; 
Sketch of the geology of the San Francisco peninsula, A. C. Lawson; 
Preliminary report on the Marc^uette iron bearing district of Michigan, 
C. R. Van Hise and W. S. Bayley, with a chapter on the Republic 
trough, H. L. Smyth; The origin and relations of central Maryland 
granites, C. R. Keyes; with an introduction on the general relations of 
the granitic rocks in the middle Atlantic Piedmont plateau, G. H. 
Williams. 
Ann. Rept. New Jersey Geol. Surv. for 1895, xl and 198 p])., 7 pis., 
1896. On caswellite, an altered biotite from Franklin Furnace, N. J., 
A. H. Chester: Surface geology — report of progress, R. D. Salisbury; 
Report on Archean geology, J. E. Wolff; The geology of the northern 
part of Jenny Jump mountain, in Warren county, N. J., L. G. West- 
gate; Report on artesian wells in southern New Jersey, Lewis Woolman. 
111. State Mus. Nat. Hist., bull. 10, 91 pp., 5 pis., July 10, 1896. Some 
new species of Echiuodermata and a new crustacean from the Paleo- 
zoic rocks, S. A. Miller and W. F. E. Gurley. 
//. Proeeedings of Scientific Societies. 
Trans. Wagner Free Inst, of Sci., vol. 4, xiv and 61 pp., 19 pis., Jan., 
1896. Fossil vertebrates from the Alachna clays of Florida, Joseph 
Leidy (edited by F. A. Lucas). 
