de 2 
AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[THIRD SERIES] 
eo 
+ 
Art. XLL—On the Variation in the Strength of a Muscle ; by 
Francis E. Nipuer, Professor of Physics in Washington 
University, St. Louis, Mo. With plate VIIL 
er. : 
€ evidence which we shall now present of variation in 
Muscular strength from day to day, is seen in the variation in 
a 
* Prof. Haughton has criticised this positi 1. xi, p. 488), his point 
. position (Nature, vol. xi, p. ; poin 
being that some muscles are called into play irregularly. He ts that the 
pies should move in the transverse plane, with the palm of the hand upward. : 
. arm wholl 
: Ti int 
— sie is position when its weight is 
y: holding the arm in this tion whe ig’ 
jo ered by an Selena toes ‘Altho Prof. Haughton’s opinion on thi 
18 worthy of grave consideration, yet I am not pt it in this 
~ </€ manner of experiment is ined to some extent by the end 
pin plished, and I am still of the opinion that I have rrors of ex 
‘oa minimum. This point, however, 
in 
Am. Jour. Ser., Tarrp sacle” do X, No. 59.—Nov., 1875. 
