Abstract
In his investigations on the temperature of the brain the author has employed, in preference to the thermo-electric pile, exceedingly sensitive mercurial thermometers, constructed specially for the purpose. Since each thermometer contains only 4 grams of mercury, the instruments respond very rapidly to changes of temperature, and a change of not more than 0·002º C. can easily be measured by means of them. The author has studied the temperature of the brain, comparing it with that of arterial blood, of the muscles, of the rectum, and of the uterus; his observations were made on animals under the influence of morphia or various anæsthetics, and also on man.
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