REVIEWS aa 
abandoned shores, bars, barriers, etc. The departure of the shore line 
from horizontality is used for the determination of the amount and 
direction of tilting. 
Reference is made to the prophecy of Gilbert as to the future reversal 
of the drainage of the St. Lawrence basin but a modification is offered, 
based upon a study of the hinge lines crossing Lake St. Clair, and upon 
the fact that no submergence has been noted near Chicago. The author 
believes that there are no processes now in operation which tend to 
reverse the St. Lawrence drainage and so bring about the predicted 
future discharge through the former Chicago outlet. 
The hinge lines of tilting have migrated northeastward following 
glacial retreat, so that the present southernmost line lies north of the 
Port Huron isobase. 
The pamphlet concerning Michigan earthquakes is largely historical. 
Deve Gas 
Journal of the Washington Academy of Sciences. Vol. I, January- 
June, 1912. Washington, D.C. 
The separate numbers contain advance notices and brief summaries 
of articles to appear in various scientific periodicals. These are of 
‘marked clearness and value because they are, for the most part, prepared 
by the authors themselves. Occasional complete papers are contrib- 
uted, notably those by Nutting on the ether, and by Brooks on applied 
geology. The proceedings of the local scientific societies are also reported 
and the journal affords a good medium of thought-exchange for the 
large number of progressive scientists that are centered in the capitol 
city. 
Eo AwS: 
Triassic Fishes of Connecticut. By CHARLES R. Eastman. Bull. 
18. State Geol. and Nat. Hist. Survey. Pp. 75; pl. 11; 
figs. 8. 
Paleontology should be regarded as an extension of human history 
and one of its great contributions is the expansion of the principles that 
seem to govern organic and social evolution. 
The view that Triassic deposits of eastern America were formed in 
tidal estuaries that were brackish or nearly fresh is replaced by the con- 
ception that they include torrential fans from neighboring mountains, 
fluvial and lacustrine deposits on the lowlands, and probably some 
