… of ditches or pools; (3) immersing it in warm water in large tanks; or (4) treating it with steam or with chemical … machines. The fibres are then passed through spreaders and emerge as a continuous sliver. These slivers are subjected …
… to be placed side by side without overlapping. Flags are larger than tiles and are usually rectangular; tiles may be … slabs. Both categories may be made from clays or other inorganic raw materials, usually shaped by extruding or …
… looms). These machines range from the very simple type to large machines with many rows of needles, in some cases … and tied, by the to and fro movement of a shuttle, by a large number of warp strands (bobbin threads) arranged on …
… sheet metal into which the flue gases or exhaust steam are discharged. In the mixing type economiser waste steam is … steam from a group of boilers. (6) Steam accumulators . Large insulated cylindrical steel high-pressure reservoirs …
… silicide . Very hard, grey, crystalline masses. Used in metallurgy, for local production of hydrogen, and in the … dark crystalline powder. A powerful reducing agent used in metallurgy. (2) Aluminium boride . Obtained in an electric …
… of discs is known as “button lac”. Shellac is used largely in the preparation of varnishes, in the electrical … conductors of electricity and acquire a negative electric charge. They soften and melt more or less completely on the …
