Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 41
Fig. 22. Fig. 23. A in its deflection, and this is proportional simply to the angleof deflection.1 To find the action of the earth in terms of the torsion ofthe wire, we must first find through how many degrees thecircle must be turned to give 1° deflection to the needle beforethe magnet L is…
Electricity
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