202 Wisconsi7i Academy of /Sciences, Arts, and Letters. 



published a memoir upon the recent inundations in France 

 and the means of remedying the evils thereof. During thi& 

 same year Dapuit in France, David Stevenson in England and 

 Ellet in this country, made valuable contributions to the 

 science. 



The annual reports to the Chief Engineer of the Army fur- 

 nish valuable information upon the improvement of rivers 

 and harbors. Time at present will not permit my tracing 

 farther the progress of this science, and I will merely add that 

 the governments of all civilized nations have fully awakened 

 to its importance, and by authorized experiments are daily 

 aiding in its advancement. 



