108 Mr. J. S. Macdonald. Studies in the 



Group B. — Experiments in which a maintained rate of 60 revolutions per 

 minute would have involved the performance of mechanical work on the 

 cycle at the rate of 19 kalories per hour (approximately 0'03 horse-power). 





Date. 



Weight. 



Revolutions 

 per minute. 



Name. 



Heat produc- 

 tion, in kalories 

 per hour. 





1913. 

 Jan. 28 



„ 29 

 Feb. 4 



„ 3 



„ 5 



kgrm. 

 54 "6 

 54-6 

 54 6 

 54 -6 

 54 6 



60 

 60 

 60 

 60 

 60 



Bennet 



205 

 190 

 202 

 182 

 188 



I 



II 

 III 



IV 

 V 



Feb. 17 

 March 3 

 » 4 

 „ 5 



54 -6 



62 -1 

 50 -3 

 60-5 

 43 -7 



60 



59 -8 

 60 

 60 

 60 



Average of 

 Bennet 

 Kemp 

 G-amm 

 Rae 



Armstrong 



193 



218 

 197 

 212 

 177 



Average of I, II, III, IV, V, 199 kalories per hour. 

 Maximal aberrations -| ^.^0 C6n * 



Group C. — Experiments in which a maintained rate of 60 revolutions per 

 minute would have involved the performance of mechanical work on the 

 cycle at the rate of 43 kalories per hour (approximately 0-07 horse-power). 





Date. 



Weight. 



Revolutions 

 per minute. 



Name. 



Heat produc- 

 tion, in kalories 

 per hour. 





1912. 

 Nov. 7 



» 11 

 Dec. 5 



kgrm. 

 54 -6 

 54 -6 

 54 -6 



59-8 



59 6 



60 -0 



Bennet 



> 3 

 JJ 



278 

 280 

 283 



I 



II 

 III 



IV 

 V 

 VI 

 VII 



Nov. 14 

 „ 15 

 „ 25 



Dec. 2 

 » 18 



May 20 



54 -6 



58 -8 

 66 -7 



59 -9 



60 -5 

 43 -7 



55 "7 



59 -8 



60 -0 

 60 

 60-1 

 60 

 60 -0 

 60 6 



Average of 

 Bennet 

 Ward 

 Sharrard 

 Turnbull 



Rae 

 Armstrong 

 Briscoe 



280 



298 

 324 

 299 

 317 

 279 

 285 



Average of I, II, III, IV, V, VI, VII, 297 kalories per hour. 

 Maximal aberrations-^ *g .J cen *' 



