Trans. Roy. Soc. Edin. PU VI Vol. XXVi. 

o 
% 
BS 
>< os as 
aol ‘ ¢ 
emt Me J 
7 Bas a i Ps 
\ 
/ SS 
oT, 
/ \ if 
\ ‘ 
‘ \ a ' . 
i . i 
1 = 
\ 4 A 
' t ri] 
\ = 
~~ SS ee ee ee = 
' 1 
ie Se eS 
J = 
° s 
X 
N ' / 
< 
x 4 
S e. 
~ 
se we 
z oe 

— 



WEAK Johnston Zdtinbargh. 

APPLICATION OF GRAPHIC METHODS TO THE DETERMINATION OF THE EFFICIENCY OF MACHINERY. 
