(IS 



AITLIKI) PHYSIOLOGY 



l>lin Bin-rounding trnipr.rul.iim inn C.JI.HC.M moUboli;;m by 

 '- t< :*> per rent. It will bo Hoon from Uiin how oxponmvo 

 a method o! regulating temperature increased boat 



production I'M. So oxpnniiivn in il,, indr.nd, Unit fcobln 

 individual;! urn MonmtinioH unabln to prodiico onoiijdi 

 bout, M,nd MiilTor u lo\v<>nn^ of ilioir body toinporuturo 

 in wmmxiiumcw ; und vvlionnvor in C.HHC.H of diHCiUHo ono 

 lindH u porinniKiiiUy niil)iionii;i,I Icinpcraiiirn, ono inuy 

 c,onc,ludn thut lioiit production in iiiHiinic.iunt. (Jood 

 examples of such (tilftilOi are found In the cane of 



und nivx(pdoniu. 



The heat produced in the muscles in response to an 



iiuTc.-isrd dcniund in distrihutiMl throti^liont tlio body by 



the blood, and much of the glow felt after hard exercise 

 is really due not so much to increased beat production 

 as to bettor heat distribution. If the movement of the 

 blood is languid and the surface bloodvessels contracted, 

 as is the case with persons who suffer from what is culled 

 a 'bad circulation,' the heat produced is not well dis- 

 tributed, and consequently such persons have difficulty in 

 maintaining their body temperuturo when exposed to cold. 

 1 We are not all blessed,' says Lewes,* ' with the same 

 * The Thy Biology of Common Life/ 1. 436. 



