Show THE COLDEST LIQUID KNOWN scientists asserts nothing can equal liquid hydrogen liquid hydrogen Is by far the coldest liquid known at the present time at ordinary atmospheric pressure it bolls at degrees F and reduction of the pressure by an air pump brings the temperature down to degrees at which the liquid becomes a solid resembling frozen foam according to prof dewar to whom the credit Is due of having liquefied hydrogen in 1898 the liquid Ss Is a colorless transparent body and Is the lightest liquid known to exist its density being only l that of 0 water the lightest liquid previously known was liquid marsh gas which is six times heavier tho the only solid which has so small density as to float upon its surface Is a piece of pith wood canslers Cass Cas lers magazine |