How to keep well : a text-book of health for use in the lower grades of schools with special reference to the effects of alcholic drinks, tobacco and other narcotics on the bodily life . t is in halves,one on each side, which are separated from each otherby a deep groove. The little brain lies beneath theback part of the brain proper. 134 HOW TO KEEP WELL How much do you suppose the brain weighs ? Well, about three pounds. As a rule, a large brain is the sign of a superiormind. Daniel Webstersbrain weighed fifty-three and a half weighed thesame. That of Cuvier,the celebrated na
How to keep well : a text-book of health for use in the lower grades of schools with special reference to the effects of alcholic drinks, tobacco and other narcotics on the bodily life . t is in halves,one on each side, which are separated from each otherby a deep groove. The little brain lies beneath theback part of the brain proper. 134 HOW TO KEEP WELL How much do you suppose the brain weighs ? Well, about three pounds. As a rule, a large brain is the sign of a superiormind. Daniel Webstersbrain weighed fifty-three and a half weighed thesame. That of Cuvier,the celebrated natural-ist, weighed sixty-fourounces and a third. Anidiots brain rarely ex-ceeds thirty ounces. 105. The Nerves.—Now, our backbone, orspine, has inside of it alarge nerve, about twofeet long, of a whitish-gray color, called thespinal cord. This goesfrom the brain downthe back of the neck;and all along it givesout little white, glis-tening threads, calledspinal nerves. Thesecome off in pairs from the spine, one to each side of the body ; sending out many other branches as they go. These nerve-branches go to the muscles, to the organs, to the skin, and to the tissues generally. In. Fig. 43- Diagram of the Brain, Spinal Cord,and Nerves, from behind. THE NERVOUS SYSTEM 135 fact, every part of the body you could touch has nervesin it. If you could follow a nerve along its course, you wouldfind, by and by, that you would trace it into either the
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