1898] SOME MORE ROWING EXPERIMENTS 99 
condescend to turn their attention to making an improvement on 
present wooden oars and solid outriggers. 
In experiments so far described, the only advances made by the 
new Indicator over the first one have been the greater facility in 
reducing the results and the possibility of obtaining a mean result 
from several strokes. Experiments will now be considered for 
which the continuous record was necessary. These have reference 
to the effect of fatigue on rowing. Fig. 10 indicates in various 
ways the growth of fatigue during a continuous piece of rowing. In 
A, ordinates represent the work done during a stroke, whose number 
from the start is represented by the abscissa. As is to be expected, 
the strokes vary irregularly, but the steady decrease during the 150 
strokes represented is quite clear. #B represents in the same way 
the falling off in the maximum pull, and gives a curve almost 
identical with A. C shows the change in stroke form during the 
interval of some 130 strokes, or six minutes’ rowing. 
It will be noticed that the falling off is most marked during the 
latter half of the stroke, when the legs and arms take a large share 
in the work. This suggests that while the powerful system of 
muscles in the shoulders and back does not easily tire, the legs and 
arms are comparatively weak. 
Fig. 11 represents the change in stroke-form in a four during an 
interval of 80 strokes. The fatigue-curves in this case are steeper 
than in the last case, but less regular. 
Fig. 11. Fatigue in Four—80 Strokes. 
_ Fig. 12 relates to a journey in a Torpid Eight. This was 
broken up into about 4 pieces by easies, but again the gradual 
diminution of power is clear, C is an analysis on a larger scale of 
strokes 210 to 310 during this journey showing the effect of an 
‘easy. The diagram shows the maximum pull, and between the 
two black lines there is clearly a break in which the oarsman has 
partly recovered his vigour. 
With regard to the magnitude of the fatigue effect, in the first 
case the fall was 18 per cent. in 6 minutes’ continuous rowing, 
150 strokes; second, 13 per cent. in 100 strokes; third, 22 per 
cent. in 350 strokes @ntermittent). These and other results show 
that, even in cases where no extreme exertion is called for, fatigue 
manifests itself, not only as a sensation; but also in diminished 
