On the Efficiency of Muscular Work. 203 



Table III. — Observations of Amar. 



■Weight. 



Work. 



Heat production. 



Weight. 



Work. 



Heat production. 



kgrm. 



calories. 



calories. 



ksrni. 



calories. 



calories. 



76-2 



156 '8 



3398 



64 -8 



137 -5 



3020 



71 -3 



114-1 



2988 



60 -2 



129 -7 



2812 



69 -6 



142 -6 



3048 



72 -4 



97-1 



2962 



58-0 



142-6 



2781 



68 -9 



129 -4 



3236 



74-6 



142 -6 



2912 



70-1 



129 4 



3214 



68-9 



128 -3 



3135 



70 -8 



161 -7 



3389 



69 -1 



142 -6 



3261 



66 ■& 



129 -4 



2908 



62-1 



156 -8 



3030 



66 -7 



137 -5 



3063 



68 -7 



128-3 



3139 



71 -2 



129 -4 



2956 



65-4 



142-6 



2996 



72 -4 



145 -6 



3023 



70-4 



128 -3 



3248 



69 -3 



129 -4 



3001 



69-1 



142 -6 



3117 



67 -4 



145 -6 



2841 . 



63 -7 



142 -6 



* 2891 



69 -6 



161-7 



3117 



62-1 



114-1 



2667 



66 -2 



121 -3 



2733 



73 -5 



142-6 



3403 



74-5 



121 -3 



2808 



61 -3 



129 -4 



2999 



67-7 



97-1 



2813 



70-1 



137 -5 



3318 



57 -5 



97-1 



2615 



79 -8 



121 -3 



2989 



70 -4 



113 -2 



2814 



61 -3 



129 -4 



3936 









The statistical constants are shown in Table IV, and the deduced 

 equation is 



H = 6-244 W + 17-777 M + 977-5. (6) 



Table IV. — Constants Deduced from Table III. 



1 Heat production. 



Work. 



Mass. 



Mean 



3015 -70 



132 -392 





68-157 





197 -927 



15 -968 





4-917 



»-H„ = -5469 m'-hw = -5754 ^^2^ = 141 -039 



= -4909 = -5250 ^^,2^ - 12 -997 



= -0977 H '•wM = - -2340 3^ 2„ = 4 -165. 



Table V compares the computed with the observed values. The agreement 

 between the computed and the observed values is reasonalily close, while, as 

 seen in Table \l, the distribution of deviations, expressed in terms of the 

 standard deviation of the prediction, is not an improbable one. The data 

 just analysed differ in kind from those of Macdonald, since there is but one 

 observation with respect to each individual, instead of a number of observa- 

 tions upon each of a few individuals. Again, the heat production is that of 

 the whole day, so that the estimated efficiency is a mere average. But such 

 a sample is of interest from the industrial standpoint, in so far as it throws 

 light upon the question of the ration needed for varying amounts of 



