Recent Puhlications. 419 
west to Shelby ville, thence north-northwesterly ^o Peoria, and thence 
north and northeast to the western part of McHenry county, from 
which it passes into Wisconsin. On the northern line of Illinois a com- 
posite belt of knolly and hilly drift about 40 miles wide, represents the 
series of marginal moraines, which appear as many separate belts far- 
ther south and in Indiana. 
In the city of Chicago about thirty artesian wells have been obtained 
at depths from 2,000 to 2,700 feet: and numerous other places have 
good artesian wells 2,000 to 2,500 feet deep. Along the Illinois river 
valley, on the other hand, several hundreds of artesian wells vary in 
depth from 150 feet, or less, to about 400 feet. It is estimated that the 
cities of Ottawa and Marseilles, in this valley, have each about two 
hundred such wells. The closely tabulated data of the artesian wells 
of all the state fill nine pages; and three pages are occupied in a tabu- 
lation of the chemical analyses, by the State Board of Health, of sixty- 
eight specimens of the waters of rivers, lakes, reservoirs, wells and 
springs. Many additional water analyses by other analysts, are also 
given in three later pages, representing man\ springs, shallow wells, 
and artesian wells. , w. u. 
RECENT PUBLICATIONS. 
I. Government and State Reports. 
California State Mining Bureau, Bull, 11, x and 94 pp., 1897. Oil and 
gas yielding formations of Los Angeles, Ventura and Santa Barbara 
counties, W. L. Watts. 
//. Proceedings of ScientifLc Societies. 
Bull. Geol. Soc. Amer., vol. 8, pp. 157-168, Feb. 22. Weathering of 
micaceous gneiss in Albemarle Co.,Va., G. P. Merrill. 
Ibid., pp. 169 182, pi. 14, Feb. 25. The Leucite hills of Wyoming, J. 
F. Kemp. 
Ibid., pp. 183-193, pi. 15, Feb. 27. ModiKed drift in St. Paul, Minn.. 
Warren Upham. 
Ibid., pp. 197-212, pi. 16, Mch. 5. Unconformities of Marthas Vine- 
yard and of Block island, J. B. Woddworth. 
Ibid., pp. 213 226, pis. 17-20, Mch. 6. Solution of silica under atmos- 
pheric conditions, C. W. Hayes; Erosioo at baselevel, M. R. Campbell. 
Ibid., pp. 227-240, pis. 21-22, Mch. 8. Gypsum deposits of Kansas, 
G. P. Grimsley, 
. Ibid,, pp, 241-250, pis. 23-24, Mch. 12. Evidences of northeasterly 
differential rising of the land along Bell river, Robert Bell. 
Ibid., pp. 251-268, pis. 25 29, Mch. 23. Former extension of Cornell 
glacier near the southern end of Melville bay. R. S. Tarr. 
Ibid., pp. 209-286, pi. 30, Mch. 29. Lake Warren shorelines in west- 
ern New York and the Geneva beach, H. L. Fairchild: Old tracks of 
Erlan drainage in western New York (Abstract), G. K. Gilbert. 
