266 The America )i Geologist. October, 1895 
Technology Quarterly, vol.*8, no. 1, Apr., 1895. Composition of the- 
sulphur petroleums of Ohio and Canada, C. F. Mabery. 
IV. Exeerptn and Individual Puhlicationa. 
A supplement to the bibliography of the Palteozoic Crustacea, A. W. 
Vogdes. Proc. Cal. Acad. Sci., ser. 2, vol. 5, pp. 5.3-7G, 1895. 
The erosive action of ice, G. E. Culver. Trans. Wis. Acad. Sci. etc., 
vol. 10, pp. 339 366, 1895. 
A geological section across the northern part of Illinois, J. A. Udden. 
Rept. 111. Board World's Fair Com., pp., 117-151. 
The volcanic rock of Alum hill, Boulder county, Colo., C. I. Andrews. 
Read before the Colo. Sci. Soc, June 3, 1895; 8 pp. 
Folds and faults in Pennsylvania anthracite beds, B. S. Lyman. 
Trans. Amer. Inst. Mining Eng., Atlanta meeting, 43 pp., .34 pis., 1895. 
The Onyx marbles: their origin, composition and uses, both ancient 
and modern, G. P. Merrill. Rept. of U. S. Nat. Museum, 1893, pp. 539- 
585, pis. 1-18. 
Tables for the determination of common minerals chiefly by their 
physical properties, with confirmatory chemical tests, W. O. Crosby. 
.3d Ed., rewritten and enlarged, 106 pp.; Boston, Published by the Au- 
thor, 1895. 
On the Organic remains of the Little River group. No. II, G. F. 
Matthew. Trans. Roy. Soc. Canada, Sec. 4, 1894, pp. 89-111, pi. 1. 
V. Proceedings of Scientific Laboratories. 
Bull. University of Wis. A contribution to the mineralogy of Wis- 
consin, W. H. Hobbs. Sci. Ser., vol. 1, no. 4, pp. 109-156, pis. 4-8, June, 
1895. 
Bull. Museum Comp. Zool. Fossil sponges of the flint nodules in the 
lower Cretaceous of Texas, J. A. Merrill. Vol. 28 (Geol. Ser., vol. 3), 
no. 1, pp. 1-26, 1 pi., July, 1895. 
Bull. Dept. of Geol. Univ. pf Calif. Critical periods in the history 
of the earth, Joseph LeConte. Vol. 1, no. 11, pp. 313-336, Aug., 1895. 
CORRESPONDENCE. 
The International Congress of Geologists: — A Correction. 
Without in anywise wishing to call in question the general statements 
of the article by Dr. Persifor Frazer in No. 4, volume XIV, of the Amer- 
ican Geologist, entitled "The Sixth Session of the International Con- 
gress of Geologists," still I must ask you to place before your readers 
the following corrections of the statements which affect me personally 
in the above mentioned article. 
On pages 266-267: The prize awarded to me in Bologna amounted to 
2,000 francs, not 1,100. I did not ask Prof. Capellini "shortly afterwai'd" 
to loan me my manuscript for a while, but this was done first at the be- 
ginning of the preparation for the geological map of Switzerland on the 
scale of 1 to 500,000, one year before the last Congress. I did not keep 
my manuscript thirteen years, as Dr. Frazer says, but only about a year 
and a half, and it is already back in Bologna. In the Report of Bologna 
