Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 507
he efficiency mainly depended upon improve their efficiency. The first ex- the form of the blades in the fan, and, periments were made upon a pump further, that the best form was a curved whose suction and discharge pipes were blade pointing in the opposite direction ten inches in diameter. The fan… … old theory which Morin, Appold, and This pump was drivenjby a single-act- many others held, and which is still ing engine working directly on to the advocated in some recent books, viz., shaft of the pump. The water was that as long as the casing outside the raised by the pump from a large cast-…
Engineering
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