Authors' Catalogue, 325 
New Deve'Iop)iients in Well Borins; and Irrigation in Eastern 
South Dakota, i8g6. By Nelson Horatto Darton. (from the 
Eighteenth An. Rep., U. S. Geol. Survey; Part IV, pp. 561-615, with 
plates xxxviii-xhii, and figures 78-85.) 
The present report is supplementary to the paper by Mr. Darton on 
the artesian waters of the Dakotas in the last preceding annual report of 
this Survey. During the year 1896, numerous additional wells were 
sunk for artesian water, chiefly to be used for irrigation, in the region of 
South Dakota adjoining the Missouri river, from which it is predicted 
that good artesian flows from the Dakota sandstone will be obtained by 
deep wells in this valley as far northward as Bismark, Log records of 
many of the wells are given. A very remarkable increase of underground 
temperature at the moderate depths of the wells (mostly from 500 to 
1,500 feet deep) is shown by the temperature of their water. The down- 
ward increment of heat is one degree Fahr. for each 17%, feet at Fort 
Randall, and the whole artesian district has a range from about 20 to 45 
feet for each degree, in contrast with an average elsewhere, throughout 
the world, of about 50 feet for a degree. The causes of this anomalous 
condition, in a region so far from any recent volcanic action and undis- 
turbed by orogenic processes, are not yet ascertained. w. u. 
MONTHLY AUTHORS' CATALOGUE 
OF American Geological Literature, 
Arranged Alphabetically* 
Agassiz, Louis. 
[Various articles on Agassiz and his work.] By A. S. Packard G. 
F. Wright, D. S. Jordan, C. R. Eastman, G. C. Davenport, B. G. 
Wilder, and others. (Am. Nat., vol. 32, pp. 147-199. Mch. 1898.) 
Sain, H. F. 
The Aftonian and Pre-Kansan deposits in southwestern Iowa. [Ab- 
stract.] (Am. Geol., vol. 21, pp. 255-262, Apr. 1898.) 
Brigham, A. P. 
Note on trellised drainage in the Adirondacks. (Am. Geol., vol. 21. 
pp. 219-222, pi. 15, Apr. 1898.) 
Calvin, Samuel. 
The interglacial deposits of northeastern Iowa. [Abstract.] (Am. 
Geol., vol. 21, pp. 251-254, Apr. 1898.) 
Chalmers, Robert. 
The pre-glacial decay of rocks in eastern Canada. (Am. Jour. Sci., 
ser. 4, vol. 5, pp. 273-282, Apr. 1898.) 
*This list includes titles of articles received up to the 20tli of .the procedinfr 
month, including general geolowy, physiography, paleontology, petrology and 
mineralogy. 
