Cyclopædia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, المجلد 21852 |
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الصفحة 284
... chlorine and chromic acid ; and a mordant is dissolved by an acid solution . By this style are produced the well - known imita- tions of Bandana handkerchiefs , in which white figures are formed on a ground of Turkey - red by means of ...
... chlorine and chromic acid ; and a mordant is dissolved by an acid solution . By this style are produced the well - known imita- tions of Bandana handkerchiefs , in which white figures are formed on a ground of Turkey - red by means of ...
الصفحة 292
... chlorine which is liberated slowly bleaches the oil . The lime is then separated by dilute sulphu acid , which disengages the remainder of the chlorine , and completes the bleaching . The objection to this process is , that the chlorine ...
... chlorine which is liberated slowly bleaches the oil . The lime is then separated by dilute sulphu acid , which disengages the remainder of the chlorine , and completes the bleaching . The objection to this process is , that the chlorine ...
الصفحة 298
... chlorine , and bromine , have no action on caoutchouc . Nitric acid renders it yellow , and when assisted by heat decomposes it : it is also charred on the surface by sulphuric acid . According to Faraday , the ultimate composition of ...
... chlorine , and bromine , have no action on caoutchouc . Nitric acid renders it yellow , and when assisted by heat decomposes it : it is also charred on the surface by sulphuric acid . According to Faraday , the ultimate composition of ...
الصفحة 299
... chlorine , in the proportion of a quarter of a pint of the acid to a gallon of the liquid . Cordage steeped in caoutchisine was found to be remarkably supple and tenacious : water - proof cloth was also prepared by its means , as also ...
... chlorine , in the proportion of a quarter of a pint of the acid to a gallon of the liquid . Cordage steeped in caoutchisine was found to be remarkably supple and tenacious : water - proof cloth was also prepared by its means , as also ...
الصفحة 307
... chlorine gas , and kept it in a state of intense ignition by directing on it the solar focus by means of the great lens of the Florentine Museum for more than half an hour : but the gas suffered no change , and the diamond had undergone ...
... chlorine gas , and kept it in a state of intense ignition by directing on it the solar focus by means of the great lens of the Florentine Museum for more than half an hour : but the gas suffered no change , and the diamond had undergone ...
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axis beam becomes bobbin boiling bottom brass brush calcined called camphor candles caoutchouc carbonic acid cards cast cast-iron centre charcoal chicory chimney chlorine chromic acid cloth coal cobalt coffee colour combustion containing copper cotton covered crystals cylinder diameter diamond drawing rollers edge employed equal feet fire fixed flame frame furnace glass heat holes horizontal inches iron layer length lever liquid machine manufacture matter means melted metal motion mould nitric acid operation oxide oxygen passing pattern piece placed plates polished portion potash pound powder pressure produced quantity removed revolve roasted roller beam rollers round roving sand scoria screw shaft side silica slag solid solution speculum speculum metal spindle substance sulphuret sulphuric acid surface temperature thick thin thread tons tube turned twist upper vapour vessel weight wheel wire wood yarn
مقاطع مشهورة
الصفحة 290 - It would be needless to add that the largest and longest are best. Decayed labourers, women, and children, make it their business to procure and prepare them. As soon as they are cut they must be flung into water, and kept there ; for otherwise they will dry and shrink, and the peel will not run.
الصفحة 395 - ... to do it for them. They have nothing else to do, but as their office must be performed from the repassing of the first to the passing of the last corve during the day, they are in the pit the whole time it is worked, frequently above twelve hours a day.
الصفحة 395 - ... which it does of its own weight. If anything impedes the shutting of the door they remove it, or, if unable to do so, run to the nearest man to get him to do it for them. They have nothing else to do; but, as their office must be performed from the repassing of the first to the passing of the last corve during the day, they are in the pit the whole time it is worked, frequently above 12 hours a day.
الصفحة 407 - ... breast-board, so placed as to prevent the passage of whole berries between itself and the roller. The pulp is then separated from the seeds by washing them, and the latter are spread out in the sun to dry them.
الصفحة 365 - ... each side of the frame. This plate is just so large as to fill the whole space, and shut the chimney entirely when thrust quite in, which is convenient when there is no fire. Drawing it out, so as to leave a space between...
الصفحة 407 - In curing coffee it is sometimes usual to expose the berries to the sun's rays in layers, five or six inches deep, on a platform. By this means the pulp ferments in a few days, and having thus thrown off a strong acidulous moisture, dries gradually during about three weeks : the husks are afterwards separated from the seeds in a mill. Other planters remove the pulp from the seeds as soon as the berries are gathered. The...
الصفحة 281 - European cloth-printing, although the methods employed are numerous, and the combinations of colours and shades of colour almost infinite, yet each colour in a pattern must, in the present state of the art, be applied by one of six different styles of work. These are termed — 1. the madder style ; 2. printing by steam ; 3. the paddling style ; 4.
الصفحة 366 - I went out and looked up at the top of the chimney ; its funnel was joined in the same stack with others, some of them shorter, that drew very well, and I saw nothing to prevent its doing the same. In fine, after every other examination I could think of, I was obliged to own the insufficiency of my skill. But my friend, who made no pretension to such kind of knowledge, afterwards discovered the cause himself.
الصفحة 398 - ... high, so on to the third and fourth ladders till she reaches the pit-bottom, where she casts her load, varying from 1 cwt. to 1 £ cwt. into the tub. This one journey is designated a rake; the height ascended, and the distance along the roads added together, exceed the height of St Paul's Cathedral; and it not unfrequently happens that the tugs break, and the load falls upon those females who are following.
الصفحة 341 - A piece of gutta percha, free from blemish, and the size of the plate required, is placed in boiling water. When thoroughly softened it is taken out and laid flat upon a smooth metal plate and immediately dusted over with the finest bronze powder used for printing gold letters. The object of this is threefold — to dry the surface, to render the surface more smooth, and to prevent adhesion. The plant is then to be neatly laid out upon the bronze surface and covered with a polished metal plate either...