Fu 


Delaßeld, Rich'd, ho't maj. gen'I, Corps of Engineers, U. S. A. Memoir 
t.li] on F 0 und a t ion s in c 0 m p res si b I e so i Is, with experimental' 
.,~ tests of pile-driving, and formula for resistance deduced therefrom. 
Washington, D. C., Dec. 1, 1868. Published by orderof the Lighthouse 
Board. 8. Washington 1868.