Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Address at the 42d Annual Convention, Chicago, Illinois, June 21st, 1910, Paper No. 1178

Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Address at the 42d Annual Convention, Chicago, Illinois, June 21st, 1910, Paper No. 1178