The tests are made by using a cubic inch of the metal and compressing it, and by trying to draw apart a square inch of metal. Indicated in pounds

TensionCompression
Aluminum15,00012,000
Brass, cast24,00030,000
Bronze, gun metal32,00020,000
“ manganese60,000120,000
“ phosphor50,000. . . . . .
Copper, cast24,00040,000
“ wire annealed36,000. . . . . .
“ unannealed60,000. . . . . .
Iron, cast15,000. . . . . .
“ “ annealed60,00080,000
“ “ unannealed80,000. . . . . .
“ wrought48,00046,000
Lead, cast2,000. . . . . .
Steel castings70,00070,000
“ plow270,000. . . . . .
“ structural60,00060,000
“ wire annealed80,000. . . . . .
“ crucible180,000. . . . . .
Tin3,8006,000