===========+========+========+=========+========+=========+========= |Pure Raw| Boiled | Boiled | Blown | Litho. | Old |Linseed | L. O. | L. O. | L. O. | L. O. |Treated | Oil | (Lino- | (Resin- | | | Oil | | leate) | ate) | | | -----------+--------+--------+---------+--------+---------+--------- Color | Amber | Dark | Reddish | Pale | Dark | Amber | Clear | Brown | Brown | | Brown | Clear | | | | | | Sp. Gr. at | .933 | .941 | .930 | .968 | .970 | .943 15 deg. C. | | | | | | |Average | | | | | Iodine No. | 180 | 172 | 176 | 133 | 102 | 172 | | | | | | Saponifi- | 191 | 187 | 186 | 189 | 199 | 197 cation No. | | | | | | | | | | | | Free Fatty | 3.2 | 2.7 | 2.2 | 2.8 | 2.7 | 6.9 Acid | | | | | | | | | | | | Unsaponi- | 1.4 | -- | -- | -- | -- | 1.8 fiable | | | | | | | | | | | | Maumene | 111 | -- | -- | -- | -- | 96 | | | | | | Moisture | .2% | -- | -- | -- | -- | none ===========+========+========+=========+========+=========+========= [Illustration: Glycine Hispida Mammoth soya bean plant] [Illustration: Glycine Hispida Soya bean plant, showing nitrogen gathering tubercles on roots] =Soya Bean Oil.= The soya plant which is extensively cultivated in Asia produces a seed bearing up to 22% and over of a golden colored oil having a peculiar leguminous odor. The oil, which probably consists of the glycerides of oleic, linoleic, and palmitic acids, is secured by crushing, steaming and pressing the seed. There are several varieties of the plant, and they are said to be the best annual legume for forage, the straw and fruit being rich in nitrogen and very fattening as a cattle food. Soya may be grown in nearly any country and is a great carrier of nitrogen to land deficient in this element. Although the oil has been used abroad for many years for soap-making purposes, its use as a drying oil is comparatively recent; being introduced into the paint industry of the United States during the year 1909, when linseed oil started on its phenomenal rise in price.