Three types of areometer are in use: (I) the ordinary hydrometer of invariable weight with a direct reading scale, a set of from five to ten being necessary to cover the range of specific gravity from 1 000 to 1.031 so as to take account of sea-water of all possible salinities; (2) the " Challenger " type of areometer designed by J.   anvd [Please select]

An instrument much used on the Continent is the Beaumé hydrometer.   anvd [Please select]

The specific gravity should be taken with an hydrometer that gives the specific gravity directly, or, if preferred, the 2 c.   anvd [Please select]

~ Determine the specific gravity by the specific gravity bottle or hydrometer, and the oxides of nitrogen by the permanganate method described under nitro-glycerine.   anvd [Please select]