New Evidence on Outlet Substitution Effects in Consumer Price Index Data

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1853 edition. Excerpt: ...to the induction, or influence, of electricity. If one side of a plate of glass be excited by rubbing it with a piece of silk, the other side will also be excited to the same degree by the electrical influence passing through the glass. This is illustrated by the following experiment. Fig. 6. Exp. 10. The Excited Glass Plate.--Support a plate of dry and warm window-glass about an inch from the table, by means of two books, and place beneath it some shreds of paper, or pith balls. Excite the upper surface by friction with a silk handkerchief, which will render it Positive; this, by induction, will affect the under surface of the glass, and through its substance, cause that side to be excited Negatively, and as it is thus virtually electrified, it will attract and repel the light bodies placed beneath it, in the same manner as an excited tube. CHAPTER VI. SEPARATION NECESSARY TO DEVELOP ELECTRICITY. IT will have been observed, that although the rubbing of two dissimilar bodies together may, and does, occasion the electric fluid to be excited, yet, it is onl_1/when these bodies are held apart, that each is found to exhibit electrical effects. Thus, in Exp. 5, the two silk ribbons will only show electrical excitement when the attempt is made to separate them; and in exciting a glass tube, the rubber must always be separated, in turn, from those particular parts it touches in its course, and not till then is it seen that those parts are electrical: and thus in every experiment, there is not merely friction, but a separation of the parts rubbed together, required to render Electricity apparent, as may be clearly proved by various experiments. Exp. 11. Glass and Twin-Foil.--Take a piece of glass 6 inches long and 3 inches wide, warm it, ...