The principles of light and color: including among other things the harmonic laws of the universe, the etherio-atomic philosophy of force, chromo chemistry, chromo therapeutics, and the general philosophy of the fine forces, together with numerous discoveries and practical applications .. . the etherealmolecules vibrate. A ray of incidentpolarized light, whose vibrations coin-cide with either of these lines, is trans-mitted through the film a ray of incident polarized light,whose vibrations form an angle of 45°with these lines, or, in other words,which coincide with the diagonals
The principles of light and color: including among other things the harmonic laws of the universe, the etherio-atomic philosophy of force, chromo chemistry, chromo therapeutics, and the general philosophy of the fine forces, together with numerous discoveries and practical applications .. . the etherealmolecules vibrate. A ray of incidentpolarized light, whose vibrations coin-cide with either of these lines, is trans-mitted through the film a ray of incident polarized light,whose vibrations form an angle of 45°with these lines, or, in other words,which coincide with the diagonals 01„. „ , the square spaces, suffers double Fig. 180. Imaginary Structure of a Plate of Selenite. refraction; that is, it is resolved into two vibrations, one parallel with ad, the other parallel withcd, and therefore the directions of the diagonals of the squaresare called the doubly refracting or depolarizing axes. But thetwo resulting vibrations are not propagated, in these tworectangular directions, with equal velocity, the one sufferinggreater retardation than the other ; so that the waves at theiremergence are in different phases of vibration. The foregoingwill be understood much more clearly by those who have becomeacquainted with the working of atoms in Chapter ^Xeutrut THE UNDULATORY THEORY. 409 There it may be seen just how atoms may combine into variousrectangular, rhomboidal and other shapes with converse, trans-verse and paraverse lines of polarity, and that the transverse linesoccur in one layer of atoms running parallel to each other, cross-ed at right angles by a similar layer of other atoms. It is thenapparent just how rays of light, striking in the direction ofarrow No. 2, fig. 180, would be about equally divided in the twoatomic channels running towards 4 and 5, with the exceptionthat refraction must somewhat modify these lines in is evident, too, that rays in the direction of arrow 1 must beprojected in greater abundance towards 4 t
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