necessary to determine the specific gravities of the various gases referred to some one of them, say hydrogen; the numbers so obtained giving the weights of the molecules referred to that of the hydrogen molecule.
eilos, like), strictly belongs to certain elements which do not possess the properties of the true metals, although they more closely resemble them than the non-metals in many respects; thus, selenium and tellurium, which are closely allied to sulphur in their chemical properties, although bad conductors of heat and electricity, exhibit metallic lustre and have relatively high specific gravities.
The following table gives the specific gravities of many metals.
Buchanan on the " Challenger " it has been usual for British investigators to calculate specific gravities for sea-water at 60° F.
Buchan, " Specific Gravities and Oceanic Circulation," Trans.