… a slot rail and current is collected via a special device known as a “plough”. (B) Rail‑cars , i.e., self‑contained vehicles running under their own power and equipped with diesel or other internal …
… asphalt (including “Trinidad Lake asphalt” and materials known in some countries as “asphaltic sands”). They are brown or black, solid or very viscous mixtures of naturally …
… oil extracted from silk‑worm chrysalises. This is a reddish‑brown oil with a pronounced and very disagreeable odour; it … ). (d) Products consisting mainly of pyridine bases (known as Dippel’s oil, also sometimes called bone‑oil) ( …
… ( except amylopectin starches, where the colour is reddish brown). Viewed under the microscope in polarised light the … is chemically similar to starch but gives a light yellowish‑brown coloration with iodine instead of blue. It is …
… particles with broken pieces of manioc pellets, brownish colour with black spots, pieces of fibre visible to … species Eleocharis dulcis or Eleocharis tuberosa , commonly known as the Chinese water chestnut. Products of this …
… ‑ Tall oil, whether or not refined. Tall oil (sometimes known as liquid rosin) is obtained from the black liquor … with dilute sulphuric acid. Crude tall oil is a dark brown, semi‑fluid mixture of fatty acids (mainly oleic and …
… (A) Synthetic organic tanning substances (sometimes known as “syntans”) . These are products which, though … acids. (2) Alkylsulphonylchlorides (sometimes known as “oilbased synthetic tanning substances”). …
… . The action of cyanamide on ammonia gives an imino-urea known as guanidine ; this can be regarded as derived from … etc.) or sometimes hydrogen. They constitute the products known as Schiff’s bases , the most important of which are : …
