Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 397
a piece ofbrass to which they are firmly screwed. Perhaps the most important advantage gained by this formis the facility with which the magnet may be taken apart and put together,2971. or with which the number of plates, and consequently the degree of mag- netism, may be varied. One form of magnet…
Mechanical engineering -- Dictionaries
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