Ottley R. Coulter wrote this interesting course in 1942. In it, he covers many classical feats of strength: how to rip a newspaper in half, card tearing, nail driving,how to break rocks with your fist(!), spike bending etc. All those are interesting, but to me, the real value is the excellent abdominal development course that appears in the last few pages.
P.S. This course in full is posted in The Iron League.