Elements of natural philosophy (Volume 2-3) . r will returnto its position of neutrality D\ with a living force due tothe action of the force of restitution over the path E D\or E D; it will, therefore, pass the point D\ after whichthe direction of the action will be reversed, the livingforce will be destroyed, the atom will again return to itsPerpetual osciiia- position of neutrality, which it will pass as before, and fortion; the same reason, and thus be kept in perpetual oscillation. But the action between the two atoms of the molecule be-ing reciprocal, the atom A will not remain stationar
Elements of natural philosophy (Volume 2-3) . r will returnto its position of neutrality D\ with a living force due tothe action of the force of restitution over the path E D\or E D; it will, therefore, pass the point D\ after whichthe direction of the action will be reversed, the livingforce will be destroyed, the atom will again return to itsPerpetual osciiia- position of neutrality, which it will pass as before, and fortion; the same reason, and thus be kept in perpetual oscillation. But the action between the two atoms of the molecule be-ing reciprocal, the atom A will not remain stationary, butwill move in the same direction as the disturbed atom andtend to preserve its neutral distance, and the oscillationchecked. that would otherwise continue will, therefore, be checked. Action of the sim- § 5. Let us next take the case of a molecule of the sim-plest molecule on plest constitution, to wit, one composed of two atoms, and examine its action on a third atom situated on the prolon- lation of X Y, joining its elements. Fig. First case; Suppose a molecule X I7, composed of the two atoms Xand J, which arc placed, the former at A, and the lat- ELEMENTS OF ACOUSTICS. 13 ter at the last limit of cohesion C\ Fig. 5. The dotted and ExP°neDtial ° curves of the waving curve beginning at Y and running towards (7, will componentrepresent the exponential curve of the atom JT, in thatatoms;direction, while the similar curve beginning at the pointE, will represent that of the atom Y\ and the full curveC A Df RCA &c., of which the ordinate corres-ponding to any point of the line A C, is equal to the alge-braic sum of the ordinates of the dotted curves correspond-ing to the same point, will be the exponential curve of the That of themolecule X Y, and will give the action of the molecule moleculeupon a third atom placed any where on the line A C be-yond Y. The curve has been carefully constructed ac-cording to the conditions of the case, and shows by simpleinspection how di
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