62 Scientific Intelligence. 
petit nemeth computed by the writer in the December caend of 
ve w. 
Beponk on the Geological and Natural History fetes ‘of 
sa for 1880; N. H. Wincue xt, State Geologist. 392 pp. 
8vo, with vi plates. St. Peter, 1881. —This new volume contains 
detailed Reports on the For estry of Minnesota by O. E. Garrison; 
on the geography and hydrology of the Upper Mississippi by C. 
M. Terry; and on the Glacial phenomena of the State and the 
region some distan rest by War 
a descriptive list of rocks, descriptions of three new Lower agree 
pice Aaa (two o id one of cao ean and a 
of Ay bits ba by Dr Pe iL. Haren Bs om. a note on an salle out- 
let of Lake Manitoba by H. 8. Trenerne 
The report on the hydrology eneiite of the rivers and lakes 
and other features with much detail. It states among its facts, 
that the lake es, of which there are several thousand, are gradually 
diminishing in extent and depth, or ae ee and a ttributes the 
e when freezing, and also os transportation shoreward when the 
iakes are flooded. An excellent map (PI. V) illustrates this report. 
r. Upham’s account of Glacial phenomena is devoted largely 
to ra courses of terminal moraines and is full of interest. The 
on p, on whi 1 
the State are given in a table as well as on the map, iad finde 
wide variations, the limits being 8. 60° E. and 8. 60° W. The map 
represents the outline of the moraine as extending from the Missis- 
sippi, between the meridians of 93° and 94°, south to the parallel of 
414°, and then as trending nor sw cekieaea with some westing to the 
Coteau des Prairies whose course it follows. West of this range, 
according to information derived from different sources, the mo- 
raine bends southward in latitude 453° and continuing to , latitude 
43° (or nearly to the Missouri) between the meridians of 97° and 
98° making a second prolongation or lobe which has the Coteau 
du Missouri along its western side. The drift sheet is stated to be 
100 to 200 feet thick over the western two-thirds of Minnesota 
—and the material is for the most part an unstratified mixture of 
earth, stones and clay. The color below is s usually dark bluish. 
e drift contains stones of Archzean rocks from north of Lake 
Superior, occasional masses of native copper from the vicinity of 
the s e, and limestone bowlders pro bably from Manitoba ; 
and rat of ‘the Archean in the till south and ‘west of Minnesota 
