HOW MUCH is A "HoRsE POWER ~
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MesSs. EDrroRs; You have furnished answer from
the Scientific american, "What is generally considered
constituting horse po,c is power sufficient raise one
hundred snd thirty pounds hundred feet in minute
equal, conclude, to raising $4,000 pounds foot per
minute.


This is widely different from the answer which collect
from Chiffon q Thompson's " Engineers Text Book .
They remark "Thcre various opinions the power
of horse According to Smeaton horse will raise %, 90
pounds one foot high in minute. Desasuos makes the
number 2I, and Watt makes it still larger, that is


$4,000 There is TO believe that this number
is too SMALL and that may add at least 900 to it,
which gives $4,000 pounds, raised one foot high per
minute"


Chiffon 81 Thompson who style themselves practical
engineers, then give the dimension of engine, which,
they say would raise 542s pounds through the space
feet in one mnue-equal to raising 94, 60 pounds one
foot in minute furnishing :" so horses power according
TO Smeaon 43 horses power according Desaguiers 80
horses power according Watt and 27 horses power
according TO The usual estimate"


As am not engineer, either scientific or practical,
offer no opinion, make no comment. G.