The naval architect's and shipbuilder's pocket-book of formulae, rules, and tables and marine engineer's and surveyor's handy book of reference (1884)
Mackrow, Clement · London, C. Lockwood and co. · leaf 452
Bejyth equal throughout. Breadth proportional to pro-duct of distance from bothpoints of support. Fig. 163. Breadth equal throughout. Depth proportional to the•square root of the distancefrom the nearest point ofsupport. … Breadth equal throughout.Depth proportional to thesquare root of the productof distance from both pointsof support. Fig. 170.