A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 483
nected with one of the poles of the ma-chine is brought near (not too near) the top of the electroscope. The interior of an iron ship, having the iron of its mastsand rigging connected with the outer shell, is a peculiarlysafe place, so far as danger from lightning goes. 458 PHYSICS It is hardly… … FIG. 247. should be connected at several points with heavy wiressoldered to large sheets of copper buried deep in dampearth. The electric currents of lightning-strokes last for an ex-ceedingly short time—a millionth of a second, let us say.It is now known that such transient currents flow along…
Physics
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