120 Scientific Intelligence. 
Ill. Ggotoey. 
1. Inundations of the Delta of the Mississippi: The Mississippi 
and Ohio Rivers containing plans for the Protection of the Delta from 
Inundation, and Investigations of the Practicability and cost of improv- 
ing the Navigation of the Ohio and other Rivers by means of Reser- 
voirs, with an Appendix on the Bars at the Mouths of the Mississippi, 
by Cuanues Ener, Jr., Civil Engineer. 366 pp., 8vo. Philadelphia, 
185 i i e 
brought out in excellent style with numerous maps and cuts in illus- 
tration of the subject. The following citations from the Introduction 
of the work give an idea of the author’s plan. 
‘The greater frequency and more alarming character of the floods 
are attributed— " 
rimarily, To the extension of cultivation throughout the Mississipp! 
Valley, by which the evaporation is thought to be, in the aggregate, di- 
minished, the drainage obviously increased, and the floods hurried for- 
ward more rapidly into the country below. 
alue. 
For the prevention of the increasing dangers growing out of these 
a co-operative causes, six distinct plans are discussed and advo- 
cated: 
ed :— 
First. Better, higher, and stronger levées in lower Louisiana, and 
more efficient surveillance :—a local measure, but one requiring state 
legislation, and official execution and discipline. 
