The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 357
tarea gives the strength of the shell; it is equal to the magneticquantity per unit of area, multiplied by the thickness of the shell. If its strength is uniform throughout a magnetic shell is calledsimple; if its strength varies it is termed complex. Emtage thus defines it: A magnetic shell is an… … Fig. 224. Magnetic Separator. STANDARD ELECTRICAL DICTIONARY. 35^ Magnetic Shield. In general a magnetic screen, q. v. vSome-times a strong local field is made to act as a shield, by its predomi-nance overcoming any local or terrestrial field to which the needleto be protected may be exposed.…
Electricity
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