The overflow of the Mississippi river

D.S. Howard
1871 Journal of the Franklin Institute  
In which S = span of spring, in inches. B = breadth of plates, in inches. T = thickness of plates, in sixteenths of an inch. N = number of plates. L = safe load on spring, in tons. Molesworth Pocket Book, 1865.
doi:10.1016/0016-0032(71)90709-5 fatcat:5egmp7ofiravpduln2od7yfntu