The foregoing t:lble contains the metals whose coefficients of dilatation are kno~r with sufficient accuracy for the purpose of testing the truth of the laws. 'I& above t:Lbk shon-s that the lengths of the oscillatirjns are in the inverse ratio of the melting points, and that the products of thcsc quantities are sensibly constant. The t~vro laws above indicated are consequently correct, and temperature is really represented by the length of oscillation of the molecules of stolid boclics.

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... 0u:: cqu:ltionS involve the elements of volatile licluifls \vhcn cornl~~~-c~~l :tt their boiling points. -. UY I'KOF. EU\VIS J. HOUSTON.