56 The American Geologist. July, 1898 
Turner, H. W. 
Notes on rocks and minerals from California. (Am. Jour. Sci., 
ser. 4, vol. 5, pp. 421-428, June 1898.) 
Upham, Warren. 
History of mining and quarrying in Minnesota. (Minn. Historical 
Soc, Collections, vol. 8, pt. 3, pp. 291-302, May 10, 18955.) 
Upham, Warren. 
Ben Nevis, the last stronghold of the British ice-sheet. (Am. 
Geol., vol. 21, pp. 375-380, June 1898.) 
Van Hise, C. R. 
Metamorphism of rocks and rock flowage. (Geol. Soc. Amer., 
Bull. vol. 9, pp. 269-328, pi. 19, May 19, 1898.) 
Van Horn, F. R. 
Studies on an interesting hornblende occurring in a hornblende 
gabbro, from Pavone, near Ivrea, Piedmont, Italy. (Am. Geol., vol. 
21, pp. 370-374, June 1898.) 
Washington, H. S. 
The Jerome (Kansas) meteorite. (Am. Jour. Sci., ser. 4, vol. 5. 
pp. 447-454. June 1898.) 
Weller, Stuart. 
Description of Devonian crinoids and blastoids from Milwaukee. 
Wisconsin. (Annals N. Y. Acad. Sci., vol. 11, no. 7, pp. 1 17-126, pi. 
14, May 17, 1898.) 
Whiteaves, J. F. " 
Postscript to a "Description of a new genus and species of cysti- 
deans from the Trenton lim.estone at Ottawa." (Canadian Rec. Sci., 
vol. 7, pp. 395-396, July 1897; issued Jan. 7, 1898.) 
Woolman, Louis. 
Fossil Fulgur perversum at Avalon, N. J. (Science, new ser., vol. 
7, p. 751, May 27, 1898.) 
CORRESPONDENCE. 
Recent Severe Seismic Disturbances in Nicaragua. A series 
of earthquakes commenced in western Nicaragua about 10:40 A. M. 
on April 29th, 1898, being felt as slight tremors on the eastern side 
of lake Nicaragua and increasing in their rapidity of motion and 
strength of force developed as the line of greatest disturbance ex- 
tended, — nearly parallel with the volcanic belt, — northwardly to the 
Pacific ocean at the entrance to the gulf of Fonseca. and thence into 
Salvador. The undulations continued about twice each twenty-four 
hours until May 12th, 1898. 
The first of the series was very much the strongest and most de- 
