On the Heat Production Associated with Muscular Work. 31-3 



or, more generally, H = H + — , (2) 



A. 



where H is the heat produced, W the work done, and H , X constants which 

 have on the average in Prof. Maedonald's experiments the values 128 and 

 0-256. H is clearly the heat produced when the mechanical work done is 

 zero, and arises from the motion of the limbs and the processes occurring in 

 the body. 



The fourth column of the table gives the results calculated from the formula. 



But this is only an average result. It was clear from Prof. Maedonald's 

 figures that the relation depended on the person doing the work, and we 

 proceeded to plot the corresponding curves for the various individuals. These 

 .are shown in fig. 2 ; and though of course the number of observations is not 



Table II. — Tabulation of Experimental Eesults (separated out in relation to 



the particular weights). 



Weight, M. 



Work, W. 



Heat produced, H. 



Measurement 



s from curves 

 2. 









H . 



A. 







Cals. per hour. 

 19 

 43 



56 



Cals. per hour. 

 177 

 279 

 346 







kgrm. 

 43 7 % 





| 84 



0-213 



54-6 ] 





13 

 19 

 43 

 56 



160 

 193 

 2S0 

 335 



1 107 



0-244 



55-7 * 





13 

 (26) 

 (34 -5) 



43 



169 

 (212) 

 (244) 



285 



1 114 



250 



58-8 





13 

 43 



181 

 298 



| 130 



0-255 



60-5 





19 



43 

 56 



212 

 317 

 347 



| 142 



258 



61 9 





13 

 19 



(34 -5) 

 43 

 56 



186 

 216 

 (265) 

 306 

 348 



} 138 



J. 



266 



66-7 





13 

 43 

 56 



209 

 324 

 352 



| 161 



0-280 



The figures in parenthesis are from a paper in ' Brit. Assoc. Rep.,' 1912, p. 286. 



