Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 55
tion is always less than the sum of thepowers of the separate bars, owing to theirinduction on each other tending to weakenthe power of each, and especially of theinterior bars. This relative weakness of thick barsseems due to the magnetizing power notpenetrating far below the surface. Thishas been… … 25. Magnetic Saturation. — The degree to which agiven bar is capable of magnetization depends on the manu-facture and temper of the steel, and on the strength of theinducing magnets. For each quality of steel, however, thereis a limit, beyond which the magnetism cannot be retainedpermanently, and…
Electricity
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