Personal and Scientijic News. 423 
PERSONAL AND SCIENTIFIC NEWS. 
Mr. C. H. Warren has been appointed instructor in miner- 
alogy in the Sheffield Scientific School of Yale University. 
Mr. J. H. Pratt, instructor in mineralogy in the Sheffield 
Scientific School of Yale Universit}'-, has accepted the position 
of mineralogist on the North Carolina geological survey. 
Warren Upham, secretary of the Minnesota Historical 
Society sailed May 26th from New York in the American 
Line steamer "St. Paul." for travel in Great Britain. Scandi- 
navia, and the Alps. He is accompanied by his wife and will 
return about September 1st. 
The Glacial Lake Hamline. In a lecture at Hamline 
University, St. Paul, Minn., May 6, Warren Upham described 
the evidences of a glacial lake which covered much of the 
western part of the area of the cit}' of St. Paul during the de- 
parture of the ice-sheet from that district. The most remark- 
able feature of the glaci^d geology of the city area was sh(>wn 
to consist in its deposits of modified drift at high levels, 
forming a group of plateaus of gravel and sand rising with 
steep slopes to nearly flat upper plains 100 to 125 feet above 
the highest terraces- which represent the old flood plain of the 
Mississippi river valle^'. The most conspicuous of these de- 
posits is the extensive high plain crossed by Summit avenue 
and many other streets, commonly called "the hill." These 
plateaus tell of a water level peculiar to this area: and the 
general contour of the region, the sigmoid course of the Mis- 
sissippi, and two moraine belts, one of northeastern drift in 
the eastern part of the city, and another of northwestern drift 
in the western part, imply that this was the site of a glacial 
or ice-dammed lake, which the speaker had named Lake Ilavi- 
line. The surface of the glacial lake during the early part of 
its existence, as shown b}^ the Hamline and Como plateaus, 
was about 250 feet above the present river, or 930 to 940 feet 
above the present sea level. A little later, when the plateau a 
mile east of lake Como was formed, the glacial lake had fallen 
five or ten feet. Still later plateaus show that lake Hamline 
finally was reduced to 875 to 870 feet above the sea. Its out- 
let was toward the southwest and south, across the present 
watershed between the Minnesota and Mississippi rivers, to 
Rich Valley and the Mississippi. In other words, the mouth 
of lake Hamline was in the southwest part of Inver Grove 
township, at a distance of about eight miles southeast of Fort 
Snelling. The modified drift plateaus formed in lake Ham- 
line are described in a recent i)aper of the Geological Societv 
of America (vol. viir, pp. 183-196, Feb., 1897, with a map). 
