204 Steam Engine, 
Cock, parts of an inch diameter.- — A small hole indeed 
to supply a boiler of twenty horses power. 
No sediment can accumulate in the boiler, it being 
supplied by distilled water. Therefore it will last much 
longer, and require less fuel than others. Muddy, lime- 
stone, or salt water, or the juice of the sugar cane, &c. &c. 
may be used to condense ; and as the engine works equal- 
ly well while we boil away the condensing water, we may 
boil for salt, sugar. See. in working the engine, — thus 
using the fuel for double purposes. 
If the steam be confined by the load on the safety-valve^ 
to raise its power to 100 pounds to the inch, area of the 
piston and the cylinder be nine inches in diameter, and 
the stroke of the piston three feet, the power will equal 
twenty horses hitched ; and will grind 20 bushels of grain 
per hour, or saw 5000 feet of boards in 12 hours. If the 
steam be confined by 150 pounds, the power of the en^ 
gine will be equal to 30 horses, when the steam is shut 
off at one third of the stroke, and striking 36 strokes pet' 
minute. — Double strokes double the power. 
The more the steam is confined, and the shorter it be 
shut off by the regulator 8, the greater will be the power 
obtained by the fuel. For every addition of 30 degrees 
heat to the water doubles the power. So that doubling 
the heat of the water increases the power about 100 times. 
On these principles fuel may be lessened to one third 
part consumed by other engines. This engine is not 
more than one fourth the weight of others ; is more sim- 
ple, durable, and cheap, and more suitable for every pur- 
pose ; especially for propelling boats and land carriages. 
It requires no more water than the fuel will evaporate in 
steam, and this steam may be employed to warm the 
apartments of factories ; or tlie condenser E, could be 
used as a still to distill spirits ; or a vat for paper makinir, 
boiler \n a brewery, dye factory, Stc. / 
