Miscellaneous Intelligence 79 
23. On the changes Selachians undergo with age; by L. Agassiz. 
24, Critical remarks about scientific views entertained upon theoretical grounds; 
by L. Agassiz. 
25. Observations on the nature and duration of lightning; by O. N. Rood. 
26. Notice of the progress of the topographical work of the Geological Survey 
of California; . D. Whitney. 
27. The 1474 Corona line; by C. A. Young. 
28. Mathematical reversal and semi-reversal; by Benjamin Peirce, 
y> i 
specific gravity is greater than that of fresh bone. 
ranville, O., Dec. 6, 1872. 
3, Niagara > Its History and Geology, Incidents.and Poetry, 
with Illustrations 3 by Gro. W. Hottey. 165 pp. 12mo, with a 
map: 1872. New York City. Sheldon & Co.—Mr. Holley has 
resided for over thirty years at Niagara Falls, and in the little 
volume he hag lately given us, he records his own observations 
and the curious facts of various sorts which he has collected 
Michigan, whose waters form their outlet by the Tlinois valley 
Into the Gulf of Mexico. These facts as well as the details of the 
