196 The American Geologist. September, i898 
Dr. Munthe errs in his supposition (followintj the majority report 
of the committee) that the transportation of the Clava strata must be 
thought to have been en masse, as a part of the old sea bed on the 
site of Loch Ness removed bodily by the ice sheet, carried probably 
ten or fifteen miles or more, and laid down bodily in a horizontal posi- 
tion under the 43 feet of till, which there forms the surface. Instead, 
the materials of the Clava beds and their included fossils are probably 
modified drift washed by drainage from the englacial and finally super- 
glacial drift of this part of the waning Scottish ice-sheet. In his final 
paragraph. Dr. Munthe takes occasion to disclaim any intention of at- 
tributing the glacially transported shelly beds of Moel Tryfan and other 
high level localities in northern Wales, northwestern England, eastern 
Ireland, and southwestern Scotland, to a marine origin. These beds 
of shell-bearing modified drift, sometimes of great extent and thick- 
ness, and frequently overlain by till, occurring up to the altitude of 
1.300 feet above the sea, appear to me referable to nearly the same 
processes as tlie stratified beds of clay, sand, and gravel, under the 
Clava till. 
From the moderate temperature of the sea at Cleongart during a 
part of the time of formation of its stratified clay. Dr. Munthe infers 
that Britain had then a long interglacial epoch, with a climate nearly 
the same as to-day. On the other hand, from a consideration of the 
conditions of climate, fauna, and flora, adjoining and upon the Malas- 
pina ice-sheet in Alaska, it may, as I believe, be more probably sup- 
posed that only a short retreat and perhaps only a short re-advance 
of the ice-sheet, not long separated in time, were sufficient to permit 
the marine beds of Kintyre to be formed and to become enveloped by 
their covering of till. w. u. 
Geological Survey of Georgia. Preliminary report on a part of the 
water-powers of Georgia. Compiled from notes of C. C. Anderson 
and other sources by B. M. Hall. (Bulletin 3-A. of the publications of 
the Geological Survey of Georgia). 
Mr. Anderson did this work under appointment while Dr. J. W. 
Spencer was state geologist, and more recently it has been extended by 
Mr. Hall, under the direction of state geologist Yeates, in connection 
with the hydrographical work of the United States Geological Survey. 
The report comprises a great amount of accurate details respecting the 
surface drainage of the state, each of the principal rivers having been 
examined at the location of the chief water-powers. The tables give 
the cubic feet of flowage per second, the fall in feet, the length of the 
shoal, the horse power and other general information. Other tables spe- 
cify the amount and kind of improvement, number of mills, horse power 
used, elevations above the sea at railroad stations and the results of 
daily gauging of several streams during two or three years. As an eco- 
nomical report it is very valuable, for water power is increasing in value, 
because of its easy transmission as electricity. We wish to commend 
especially the excellent index, for no such report should be issued with- 
out an index, but we cannot approve the peculiar and copious use of 
commas which punctuate the text. N. H. w. 
