RATIO OF SPEED OF A STEAM BOAT TO THE POWER. 



G5 



Maximum speed, full power 8'2 knots. 



One fire banked up under each boiler ....... 8'0 ,, 



The same, with more head wind, and fires banked up under one set, and full 



fires under the other 6'2 



Thus, | speed with fuel ; ship deep. 



TABLE VIII. Her Majesty's ship Phoenix. Tonnage, 815 ; power, 220 ; boilers, 

 iron ; pressure on the valve, 3^ Ibs. ; wheels, radiating. 



With full power 8-4 8'6, 



Reduced 8-2 8'6, 



Sails set 9-0 9-2, 



Full power 3'6 5-6, 



Full power 9'2 knots, 

 7-2 

 4-6 



YACHT IN TOW. 

 6 fires, 15 bushels, 



6 

 6 



15 

 15 



Moderate, and fine weather. 



Fresh, and strong head wind. 



Sails set, five. 



Head wind, moderate. 



Do. do., fresh. 



No satisfactory record of speed by one boiler alone. Welsh coal a saving of Jth over 

 Scotch, though not the best quality. Two revolutions approximate to the knot ; and the 

 table formed on propositions of Lieut. T. Baldock. 



(Signed) ROBERT OLIVER. 



* 



The results of these experiments, although they do not sufficiently coincide to establish the 

 exact law of the ratio of speed to the effective power, agree in showing, that the last mile or 

 half mile of velocity is obtained at a very great expense of fuel, and that in circumstances 



