OCR Text |
Show Burning Is Sometimes Produced by Oil Sprays In investigating the burning sometimes some-times produced in using oil sprays, George P. Gray, chief of the division of chemistry of the Iowa State Department De-partment of Agriculture, has discovered discov-ered that the "bum" Is not produced by physlclal characteristics of the oil, but chemical compounds known to chemists as "cracked oils." These are the constituents responsible for the offensive odors from burned gasoline or kerosene and the cutting of engine bearings. By treating the oil with sulphuric acid they are removed. The sulphonatinn test for mineral oils used as Insecticides will show the presence pres-ence or absence of these "cracked oils." This. Mr. Gray believes, may lead to the manufacture of oil sprays ! which will not burn foliage or fruit when used as sprays. |