100 



NATURAL SCIENCE 



[August 



output, and it can easily be imagined how much larger must he 

 the fall in a hard race. 



A rough experiment was made to test the use of the indicator 

 for determining the relation between horse power and the resulting 

 velocity of the boat. A pair was rowed between two points, both 

 up and down stream, in order to eliminate the stream velocity. 

 The time and number of strokes was carefully noted. This was 



Fig. 12. Fatigue in Torpid Eight. A and B 350 Strokes, 100 Strokes. 



carried out once with very little exertion and again working hard. 

 The measurement of the diagrams, combined with the other observa- 

 tions gave the H.P. corresponding to a certain relative velocity. 

 Assuming H.P. ^ (Yel.) r , x was found by this experiment to be 

 2*5 — a result probably too low. 1 For the experiment to have a 

 scientific value it would be necessary to indicate both rowers. 



The experiment is alluded to as suggesting the possibility of an 

 investigation that might lead to useful results, and although the 

 author has given a description of some experiments which he hopes 

 may be of some interest to the rowing man and also to the physio- 

 logist, yet he feels that at every point, more extended, and often more 

 careful experiments, for which he has now no longer the opportunity, 

 would be of interest and importance to science. 



E. Cuthbert Atkinson. 



Temvle Observatory, 

 Rugby. 



1 See Appendix III. 



