370 Thirty-first Meeting of the British Association. 
and* Henry Bell, who were the pioneers in the great march of progress. 
Viewing the past, with a knowledge of the present and a prospect of the 
future, it is difficult to estimate sufficiently the benefits that have been 
possessions de- 
pended entirely upon the state of the weather. It was only in favorable 
ships of war the screw is indispensable, on account of the security it 
affords to the engines and machinery, from their position in the hol 
bh 
miles an hour. Neither George aaj hannes himself, nor any one € se “i 
at that time the most distant idea of the capabilities of the railway syst® 
‘ : : eed 10 or 12 
miles an hour; and our present high velocities, due to high-p 
steam and the tubular system of boilers, have surpassed the mest en 
guine expectations of engineers. The sagacity of George Stephenso” 
