Its specific gravity is o 865; hence it is the lightest metal known except lithium.
Time showed that the winning of Kansas was a question of the lightest-footed immigrant.
When loaded with either of the lightest two weights the instrument is specifically lighter than Sikes's hydrometer when unloaded, and it may thus be used for specific gravities as low as that of absolute alcohol.
Had he not done so, lifelong seclusion in a monastery would have been his lightest fate.
The relative weights of atoms. He took hydrogen, the lightest substance known, to be the standard.