Popular Science

lt is computea tnm ene earra uoos nuo recoive more than about ono two-thousand-millionth part of the total radiution of the sun's rays. Expernuonts have been going on for the past two years for the purpose of trying to learn something of the characteristics of the Atlantic ocean as a great moving body of water. As a result the wholo Atlantic is shown to be slowly ciroulating round and round, like an enormous pool. Ata reoent meeting oí thoLondon Physical sooiety specimens wero exhibited of a heat indicating paint At ordinary temperatures the puint is red, but when heated to 06 degrees F. it turns black. Paper painted with this composition and warined at a stove exhibits the change In a few hours.