522 ON THE EXPLOSION OF THE BOILER 
the values of E & 8, from the tables at the end of Mr. Mose- 
ley’s Engineering, &c. 
u= 64 x 6648 =8.386 ly. 
ee % 1asa600 % 34720 a 
14. When the motive force of the steam acts 
upon the top of the boiler, as in Art. 10, it is 
required to find the horizontal velocity of the 
centre of gravity of the Locomotive Engine, at a 
given time, the pressure of the atmosphere on the 
top of the boiler being neglected. 
Let w=the horizontal velocity of the centre of gravity of 
the Locomotive Engine, at the time, ¢. 
a=3,14159, &e. 
Then retaining the notation, in Art. 10. 
gap x sing aa i 
w 
But, p=" (by Art. 9)=—-e"* (by Art. 9) ; 
D 
a) ) (by Aan) 
lL I 
& sin § = 
