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Show THE COLDEST LIQUID KNOWN. Scientists Asserts Nothing Can Equal Liquid Hydrogen. Liquid hydrogen is by far tho coldest cold-est liquid known at tho presont timo. At ordinary ntmospheric pressure it bolls at 422 degrees P., and reduction reduc-tion of tho pressure by an nlr pump brings tho tomporaturo down- to 432 degrees, at which tho liquid becoraos n solid, rcsombllng frozen foam. According to Prof. Dowar, to whom tho credit 13 duo of having liquefied hydrogen in 1898, tho liquid is a colorless, color-less, transparent body, and is tho lightest liquid known to oxlst, its density boing only M4th that of wator! tho lightest liquid previously kr.own was liquid marsh gas, which Is six times heavier. Tho only solid which has so small density as to float upon Its surfaco is a pleco of pith wood. Cassler's Maga-7.1 Maga-7.1 no. |