.y} V i: V i: K. 



J/ial J 'rtnl infion. 

 UEmaB SccTioN. 

 y - \V X » X •!»■ •»• ■" 31.5 X 96 X 0.75 = 22.08 = heal addrd to reserve. 



iU'ut lust from calurinivtcr 10J.40J3 



II. ;it Qlllll'tl to rcMTVC 22.C8 



at lost from eaiorimeler beyond that produced b2.72&3 



After Sectio.n. 

 li - W X t X »p. h. =31.5 X 2..Ti X 0.75 = 54.81 = heat aildcd to reserve. 



Ileal lust from culorinieter b5.C325 

 llcut added to rvservc 54.81 



TTiiil li'sl frum cnluri'iiulcr (ibuvc that productJ 30.8225 

 Si MM.MtV. 



Moat lost from calorimeter above that priMluced before section 82.7253 

 Heat loot from calorimeter above that produced after section 30.8225 



Apparent gain o/heat production /allowing section 61.9028 



In .studyin;? the series of experiments just reported, the excessive loss of heat by 

 tin- ralorimiter at once attracts attention. As already stated (piifje 19), the appa- 

 ratus when worked at hij,'h tcniiM-raturcs is very unsatisfactory, the loss of heat 

 fniin it licirij,' not only very };reat but also irrrguhir. By the previous u.se of water 

 at 100^ !•'., and other precautions, the attempt was made to have the calorimeter 

 heated equally ihrou^'hout, but very carefid experimental tests have shown that 

 this is almost impossible, and that all experiments made in the manner of those 

 just recorded must be received with great reserve. The results are, however, so 

 decided as perhaps to be beyond the probable limits of error, especially as they 

 seem coincident with the results obtained by exposing animals to a hot atmo- 

 sphere before and after section of the cord. It was found that in strong animals 

 the temperature rose faster after section of the cord than luforc, while in weak 

 animals the reverse was the case. In Experiment 35 the animal temperature Twe 

 much faster before than after s«'Ction, and the jjroduction of heat was mu(h less 

 after the operation. 'I'lie same is true of Experiment 'M. In Experiment 37 the 

 hourly rise of rectal temperature was not quite 0.2° F. faster after than lH»forc 

 section, and the production of heat 31 units more; in Experiment 3S the animal 

 was very hot when put in the box the second time, and the temperature did not 

 rise materially; this time the lieat production was slightly diminished by the section. 

 Finally, in Experiment 3!) the rectal temperature rose more than twice as fast after 

 the division of the cord, and the gain of heat production was corresponding. 



If these exi)eriments be of any value whatever they show two things: First. 

 '1 hat the fall of temperature of the body usually following spinal section has a 

 Very important effi>ct in les.s(>ning the amount of heat produced, ». r., the chemical 

 movements of the body Sinmil. Tliat when the effect of the cooling of the body 

 is done a%vay with, section of the cord is sometimes followed by a decreased, some- 

 times by an increa.sed heat iiroduction, and that the latter occurs especially in 

 robust nnim iK I desire to repeat that these conclusions must be received with 



