Show t Changing Color Members of the Physical society infix In-fix London were Interested at a recent i 4 A meeting by an exhibition of Bpclmeus of paint which change their color + i with variations of tho temperature Ono of theso paints Is red at ordinary IiI temperatures but turns black In a r few seconds when warmed in front of a a stove or otherwise heated to 206 des de-s grees Fahrenheit I iii Another paint is yellow until heated s heat-ed to a temperature of 113 degrees t Fahrenheit when It becomes dark red f 1 k 1 They are called boat indicating paints but arc little moro than scion title curiosities i |