Abstract
Absorption spectra of twenty elements, 4500 to 2000 A, obtained with condensed spark in water.—These spectra, seven of which are reproduced, consist of a continuous background crossed by bright and dark lines characteristic of the metal. For Al, Bi, Cd, Au, Ir, Pb, Mg, Pt, Rd, Ag, Sn and Zn, the absorption lines are those which are reversed in the arc. For Sb, Co, Cr, Cu, Fe, Mo, Ni and W, the water spark shows as absorption lines all the lines reversed in the arc and in addition about four hundred absorption lines, in all, which are not listed as reversed in the arc. Some of these are mentioned.

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