386 The Americafi Geologist. Juue, 1900 
mineral. This has since been shown by Lacroix to be probably the 
same mineral as that described in 1877 in the Mineralogical Magazine 
(vol. I, p. 154) several years earlier and named bowlingite, and by him 
thought to result from an alteration of olivine. The term iddingsite was 
therefore unnecessary and should not be perpetuated. The writer has 
encountered the same mineral in the igneous rocks of the Keweenawan 
in Minnesota. (Am. Geol., vol. 23, p. 43, 189Q). n. h. w. 
MONTHLY AUTHORS' CATALOGUE 
OF American Geological Literature. 
Arranged Alphabetically.* 
Agassiz, Alexander. 
Explorations of the "Albatross" in the Pacific. (Am. Jour. Sci., 
vol. 9, pp. 369-374, 1900.) 
Atwood, W. W. (R. D. Salisbury and) 
The Geography of the region about Devil's lake and the Dalles 
of Wisconsin, with some notes on its surface geology. Wis. Geol. 
and Nat. Hist. Sur., Bull. 5, pp. 151, 38 plates, Madison, 1900. 
Bain, H. F. 
Geology of the Wichita mountains. (Bull. G. S. A., vol. 11, pp. 
127-144, pis. 15-17, Mar. 1900.) 
Bascom, Florence. 
The dike rocks (of the slate belt of eastern New York and west- 
ern Vermont). (19th Ann. Rep., U. S. G. S., Part III, pp. 223-226, 
1899.) 
Bayley, W. S. 
The Sturgeon River tongue. (19th Rep., U. S. G. S., Part III, pp. 
146-151, 1899.) 
Bertrand, Marcel (et Phillipe Zurcher). 
Etude geologique sur I'istheme de Panama. Quarto, pp. 24, 3 
■geological plates. Paris, 1899. 
Bertrand, Marcel. 
Les phenomenes volcaniques et les tremblements de terre de 
I'Almerique centrale. Quarto, pp. 25-38. Paris, 1899. 
Branner, J. C. 
Ants as geological agents in the tropics. (Jour. Geol., vol. 8, pp. 
151-153. Feb. -Mar. 1900.) 
Branner, J. C (and J. F. Newsom). 
Syllabus of a course of lectures on economic geology. 2nd edi- 
tion, interleaved, pp. 342. Stanford University, 1900. 
*Tliis list includes titles of articles received up to the 20th of the preceding 
month, including general geology, physiography, paleontology, petrology and 
mineralogy. 
