The oval skull is usually considered the ideal in shape. A sharp skull usually marks a low mental activity, although this is not always the case. Intellect depends only in part on the size of the brain. Portions of the brain have been lost without loss of activity. The "American Crowbar Case" is the most famous, when a bar 1 1-2 inches in diameter, and 3 feet long was shot in blasting through a man's head, entering in the jaw and coming out in the forward part of the head. This man recovered. Experiments on animals show that cutting out certain parts of the brain will produce paralysis of certain parts of the body. Disease, strong emotions, fear, grief, will also produce paralysis. The wonderful and inexplicable action of the will is thus stopped. The mind often produces pain or disease by simply concentrating attention on certain parts of the body. A criminal once died from imagining that he was bleeding to death. Brain diseases are the cause of great mortality, especially among children. In all exposure a man should keep up courage, and not let his imagination overcome him.