Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 223
e permanent magnets gradually diminish in strength,and thus reduce the output of the machine. On acccuuit of their simplicity, however, perma-nent magnets are still employed in machines of the I)e Meritens type, intended for light-house work. (See Alliance. Pixii, and other magneto-machines, pp.… … 1 . ($f 1.._.... f
Mechanical engineering
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