Sullivan on the Revolving Engine. 113 
nn ‘The springs which keep the valves together 
oo ©The a legs valve box and pipes leading steam: to the cyt 
pp Pipe leading from the cylinders, 
rr The intermediate sha 
s The clutch box, to re the shaft and wheel, 
t The clatch box lev 
uu Cog wheels efeneeicean motion—the reverse of this 
Peon is found i in 1 experience preferable, 
ww The meet 
oUF he aati es, 
we The gear and nine for the = supply pump. 
ase . The Saale or 5 face of the valves shewing the goons, ee 
_ The cross pipes a the. 
back motion, 
4. Wheels’ with er es 
“placed on its head. 
> cia a pedi of'a Boat the boilers above se (see note b) 
Ph. re The stern view of the revolvi Pa pp 
ial 3. Outline of the apparatus asngsiod to the stern, 
ig 10». Profile of the stern with paddles. 
Note a By proportioning the revolutions of the engine to the 
motien of the. dies or wheels so that the engine will ease 
move moderately and the wheels fast ; we are able when e] 
has Speed, either from the wind or steam, to superadd ny power of 
this. to her acquired momentum, so that the maximum of 
effeet may be attained. If the engine | ert too fas 
the pe Ames they may be made to take more hold of the water— 
Ness ge ner eee ror ae ey ae 
a-part from the loading and passengers as possible, the — 
invented fue will permit 62 arrangements very favourable to the 
economy of reom. 
Note c. The advantages Ag a double engine are perhaps very 
important in boats of the largest class, but a single engine applied 
to the stern propellers, is the most simple and lightest form of t 
engine ; and is best adapted to o those rivers of fre —— which 
flow —e land, and ie eile i r chann 
No. 1. 1 
