94 



NATURAL SCIENCE 



[August 



In the table, results are shown of the experiments relating to 

 work done in a gig pair, both on sliding and fixed seats. The 

 author regrets that the stroke rate was not taken in more cases, it 

 having been measured in only seven of the experiments. It is, 

 however, not far from the truth to assume that the estimated rates 

 in other cases are not in error more than one stroke a minute. 1 



The trials involved in the table have all been short, ranging from 

 one to ten minutes, and speaking generally a similar rate of working, 

 with a gradual fall in power, could have been continued for some 

 twenty minutes, while, at high pressure, exhaustion would ensue 

 under similar conditions in less than ten minutes. 



E OWING IN Gig-Paik 

 Average time between easies — 3 min. 



Average stroke-rate — 22. 



The table indicates that Man Power in rowing is about -\ H.P. 

 and varies with individuals and effort between '2 and -4 H.P. 



1 With reference to stroke rate, it is worthy of note that the usual custom of counting 

 strokes, in which the number of strokes in the water is taken, makes an error of more 

 than half a stroke, by omitting one swing forward. Thus if strokes are counted for 

 \ min. the deduced rate is too high by 2 per minute. 



