Investigations into the conditions governing the temperature of tlie body. 19 



For the temperature of the skin pretty much the same 

 holds good as for the mouth temperature; as a rule, I have not been 

 able to notice any rise occasioned by muscular work. 



Time Temp, of the skin (forehead) 



230 p. m. 275° С On upper deck of ship, windy. 



4-45 p. m. 283° - — almost calm. 



The last temperature was measured after some hours' energetic 

 exercise. The rectal temperature was not measured; but by analogy 

 with previous days it may be estimated at about 37° before work, 

 and at about 384° after. Making allowances for the wind being 

 less, it таз' without doubt be concluded that the temperature on 

 the forehead had not risen during the work. 



There is however one special form of work, brain work, which 

 is able to influence appreciably the temperature on the forehead (on 

 the hairy part of the head I have not been able to measure the 

 temperature). With light reading the temperature rises a few tenths, 

 with more strained work somewhat higher; fixed numbers cannot 

 be given. 



Time Rectal temp. Moutli temp. Skin temp, (forehead) 



10-45 p. m. 37-2° С 364° С. 346° С. In temperate room. 

 11-45 p.m. 36-75° - 3618° - 342° - - after 1 hour's reading. 



In the above case the rectal temperature falls, even rather con- 

 siderably, owing to rest after some exercise; the mouth temperature 

 also falls, though less, probably owing to the temperature in the 

 room decreasing; but the temperature of the skin, otherwise so 

 variable, does not take part in the decrease; owing to the work of 

 the brain it remains almost unchanged ^ 



During sleep the temperature of the forehead does not undergo 

 any definite change. If sleeping with a blanket over the head, the 

 temperature on waking will be found to be high in comparison 

 Avith the rectal temperature and the mouth temperature, and then 

 it will fall rather considerably while dressing in a cold room; while 

 the other temperatures recorded will fall quite inconsiderably or 

 remain unchanged. 



As the heat of the body is not, or at any rate only to a slight 

 extent, produced at the places where the temperature is measured, 

 the heat must be imparted to the latter indirectly through the 

 circulation. The more energetic the action of the heart, the sooner 



^ Cf. the further measurements on page 35. 



2* 



