… 15.07 to 15.14 . The following are of particular commercial importance : (1) Linseed oil , obtained from the seeds of … plant ( Linum usitatissimum ). This oil is one of the most important of the drying oils. Linseed oil varies from yellow … acid and linoleic acid, which are liquid at room temperature. They may be used for the same range of purposes …
… heading is a residue of the distillation of either high temperature coal tars or other mineral tars. It contains a … residual product left from the distillation of either high temperature or low temperature coal tars or of other mineral tars or of their …
… absence of air, usually in gas works or coke ovens. It is a complex mixture of hydrogen, methane, carbon monoxide, etc., … and also water gas, producer gas and similar gases, for example blast‑furnace gas. It also covers mixtures of gases … in the presence of steam. These mixtures are similar in composition to coal gas and are used for heating or lighting …
… Fel d spar , leucite , nepheline and nepheline syenite are composed of complex silicates of aluminium and alkali or alkaline‑earth … up into its constituent particles; as these differ in size, simple screening then permits removal of part of the silica …
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