Correspon(^euce. 339 
Kans. Univ. Quarterly, vol. 6, no. 3, July, 1897. Restoration of Kan- 
sas mosasaurs, S. W. Williston; On the composition of the Louisville 
mineral water, E. H. S. Bailey; Notes on the osteology of Bison anti- 
quus, Alban Stewart. 
Araer. Jour. Sci., Sept. Principal characters of the Protijceratidae, 
O. C. Marsh; Jura and Neocomian of Arkansas, Kansas, Oklahoma, 
New Nexico and Texas. Jules Marcou; Pithecanthropus erectus, L. Ma- 
nouvrier: Cape Fairweather beds, a new marine Tertiary horizon in 
southern Patagonia, J. B. Hatcher. 
Ibid., Oct. Fractional crystallization of rocks, G. F. Becker; Eopa- 
leozoic hot springs and the origin of the Pennsylvania oolite, G. R. Wie- 
land; Systematic position of Crangopsis vermiformis (Meek) from the 
Subcarboniferous rocks of Kentucky, A. E. Ortmann; New species of 
the palinurid genus Linuparus found in the Upper Cretaceous of Da- 
kota. A. E. Ortmann; Pseudomorphs from northern New York, C. H. 
Smyth, Jr.; Chemical composition of hamlinite and its occurrence with 
bertrandite at Oxford county, Maine, S. L. Penfield. 
Jour, of Geology, Sept. -Oct. The Newark system of New Jersey, H, 
B. Kummel; The topography of California, N. F. Drake: A comparative 
stud\ of the Lower Cretaceous formations and faunas of the United 
States, T. W. Stanton: Correlation of the Devonian faunas in southern 
Illinois, Stuart Weller. 
IV. Excerpt)^ and ludividaal Pidylications. 
Ferric sulphate in mine waters, and its action on metals, L.J. VV. 
Jones. Proc. Colo. Sci. Soc, 9 pp., read June 5, 1897. 
Some analyses of Nova Scotia coals and other minerals, E. Gilpin, Jr. 
Trans. Nova Scotian Inst, of Sci., vol. 9. pp. 2i6 254, 1897. 
Volcanoes of North America. A reading lesson for students of geog- 
raphy and geology. By I. C. Russell, xiv and 364 pp., 16 pis.; New- 
York, The Macmillan Co., 1897. 
CORRESPONDENCE. 
The Finland Excursion of the 7th International Congress of Ge- 
^dogists. — On the twenty-first of August over a hundred geologists, 
representing perhaps fifteen nationalities, met at the capital of the 
Grand-Duchy of Finland, for a week's excursion in that beautiful 
country of lakes. Director Sederholm, of the Geological Commission 
of Finland, had immediate supervision of the excursion and through 
the week interpreted the geology of the pre-Cambrian crystallines of 
the mainland. 
Drs. Frosterus and Hackman and Baron De Geer expounded the 
glacial geology during the trip, while Dr. W. Ramsay took charge of 
the party while on the island ot Hogland. 
The first day of the excursion was spent in the region immediately to 
the southwest of Tamraersfors, in the neighborhood of Suto, Suoniemi 
■and Mauri. At th-e two first named localities are exposed the mica- 
