Show HOW TO TEST LINSEED OIL there Is nothing that will make paint go eo wrong on the house more quickly than poor oil it is as bad in its way as adulterations adulte rations in the white lead petroleum oil may be detected by placing a drop of the oil on a black painted surface if one sees the characteristic iridescence or play of colors which kerosene exhibits it la in evidence of adulteration corn and fish oil can be detected by the smell adulteration in white lead can best be discovered by the use of a blowpipe which national lead company will send with instructions free to anyone interested in paint address national lead company woodbridge building new york |