Reviezv- of Recent Geological Literature. 251 
Antecedant. consequent, subsequent, and superimposed streams are 
to be distinguished. The history of these four types is shown in de- 
tail, as well as the drainage development in each of the three erosion 
cycles. 
The drainage during the Cumberland tpoch and the present inter- 
relations of the three peneplains are well illustrated by a series of 
maps. 
A new summary of fundamental principles is not without value 
in connection with the bringing forward of new facts. This paper 
adds valuable details to the erosion history of a particularly interesting 
district and furnishes both a satisfactory report of general principles 
from a new point of view and an addition to the facts upon which 
such generalizations are based. i. H. o. 
A Preliminary Report on the Artesian-lVcll System of Georgia. 
By S. W. McCallie, Assistant Geologist. Bulletin No. 7, Geol. Sur- 
vey of Georgia. Pages 214, with two maps, numerous profiles, and 22 
figures in the text; i8q8. 
The large area of Cretaceous and Tertiary strata in the south part 
of the state is found nearly everywhere to yield artesian water from 
moderate depths, averaging about 450 feet. In cities and towns deriv- 
ing their domestic supply of water from the artesian wells, the former 
prevalence of chills and fever has been much diminished. The first 
successful artesian well here was bored in 1881, and previous to the date 
of this report (October, 1898) the number of such deep wells in use in 
southern Georgia exceeded two hundred. w. u. 
Devonische Fischreste ans der Eifet, von Friedrich v. Huene. 
(Xeues Jahrbuch filr Mineralogie, Geologic und Palasontologie, Jahrg. 
1900, B. I.) 
This brochure relates to a lower jaw of a fish from the Devonian 
rocks of the Eifel. The object is a fragment of the jaw and is referred 
by Baron von Huene to Newberry's genus Rhynchodus. Two figures 
are given in the text, G. F. M. 
77/1? Great Lakes and Niagara. By Ralph S. Takk. Bulletin 
of the American Geographical Society, vol. xxxi, pp. 101-117, 217-235, 
and 315-343, April, June, and October, 1899. 
In an admirable series of illustrated articles on the "Physical Geog- 
raphy of New York State," Prof. Tarr devotes three numbers to reviews 
and discussion of the Glacial and Postglacial history of the region of 
the great lakes tributary to the St. Lawrence river and the problem of 
the duration of the Postglacial period according to estimates based on 
the erosion of the Niagara gorge. The first paper treats of the origin of 
the lake basins; the second, of the glacial lakes temporarily held by the 
waning ice-sheet at higher levels than the present lakes, with outlets 
southward over present lines of watershed; and the third considers the 
methods of erosion and age of the Niagara river and falls. Each arti- 
cle is accompanied by plentiful citations of the somewhat abundant lite- 
rature, and aims mainly to pronounce impartial decisions upon the value 
