A Practical Treatise on Mechanical Engineering: Comprising Metallurgy, Moulding, Casting, Forging, Tools, Workshop Machinery, Mechanical Manipulation, Manufacture of the Steam-engine, Etc. Etc. ; Illustrated with Twenty-eight Plates of Boilers, Steam-engines, Workshop Machinery, Etc. and Ninety-one Wood Engravings ; with an Appendix on the Analysis of Iron and Iron OresAtchley and Company, 1863 - 248 стор. |
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A Practical Treatise on Mechanical Engineering: Comprising Metallurgy ... Francis Campin Повний перегляд - 1864 |
A Practical Treatise on Mechanical Engineering: Comprising Metallurgy ... Francis Campin Повний перегляд - 1864 |
Загальні терміни та фрази
accurately action air-pump alumina ammonia ammonium aperture apparatus attached baryta beam beam engines boiled boiler bolts bored bottom carbonate carbonic acid cast-iron casting centre chloride condenser connecting-rod consists contains copper crank cross-head cutting tools cylinder described diameter dissolved eccentric employed engine evaporated exhaust extremity feet filter filtrate fitted fixed force ft.-lbs furnace furnished gear heat hence horizontal hydrochloric acid hydrogen lathe length lever locomotive lower machine machinery magnesia main shaft manganese means metal method mineral motion mould move nitric acid obtained oxide passes peroxide of iron phosphoric acid piston piston-rod placed Plate plunger port faces position potassa precipitate pressure produced pump quantity reverberatory furnace ring screw sesquioxide shown side silica slide valve soda solution square inch steam-engines steam-tight stroke sulphide sulphuric acid surface surface condenser tion traction engines trunnion tubes upper usually various velocity vertical weight wheel
Популярні уривки
Сторінка 159 - Emily. Water cannot, then, be raised by a pump above 32 feet; for the pressure of the atmosphere will not sustain a column of water above that height. Mrs. B. I beg your pardon. It is true that there must never be so great a distance as 32 feet from the level of the water in the well, to the valve in the piston, otherwise the water would not rise through...
Сторінка 222 - This is based on the reciprocal action of chromic acid and protoxide of iron, whereby a transference of oxygen takes place, the protoxide of iron becoming converted into peroxide, and the chromic acid into sesquioxide of chromium. The process is conducted as follows : — A convenient quantity of the specimen is reduced to coarse powder, and one-half at least of this is still further pulverized until it is no longer gritty between the fingers.
Сторінка 227 - The method of separating iron from either cobalt or nickel, or both, consists in precipitating the iron by means of oxide of lead (litharge) : the process is conducted in the following manner. The mixed metals are brought into solution as nitrates, and the solution is then evaporated nearly to dryness, water is then added, and also oxide of lead, after which the solution is briskly boiled for ten minutes or a quarter of an hour, the iron is entirely precipitated from the solution, the other nitrates...
Сторінка 221 - This is based on the reciprocal action of the salts of protoxide of iron and permanganate of potassa, whereby a quantity of the latter is decomposed exactly proportionate to the quantity of iron. The ore (about 10 or 15 grains) is dissolved in hydrochloric acid, and the metal brought to the minimum of oxidation by boiling the solution with sulphite of soda (or better, by pure metallic...
Сторінка 226 - ... filtrate is precipitated by sulphide of ammonium. The reason why it is necessary to dilute the solution of the two oxides with water, free from atmospheric air, is, that oxide of cobalt in an ammoniacal solution is converted into peroxide of cobalt, which, precipitating as a black powder, would contaminate the oxide of nickel. The more dilute the solution is, the less easily does the oxide of cobalt become oxidized. When a large quantity of ammoniacal salt is present, the quantity of caustic...
Сторінка 226 - NiO, and chloride of nickel is also decomposed by caustic potassa into protoxide of nickel and chloride of potassium. Hence, the following method of analysing mixtures of cobalt and nickel, which is applicable to all proportions. Hydrochloric acid is added to the solution of the metals, and then cyanide of potassium in such excess that the precipitate at first formed is redissolved ; the whole is boiled, adding from time to time hydrochloric acid, until hydrocyanic acid ceases to be evolved. Caustic...
Сторінка 65 - ... one-third of the common distance between the positions of the piston and the result will be the work done upon each square inch of the piston after expansion begins. The work done before...
Сторінка 178 - EXPERIMENTS. 36. In order to test the practical value of this theory, I shall compare its results with those of the experiments which were made by Mr. Wicksteed on the large Cornish pumping engine, built under the direction of that eminent engineer, by Messrs. Harvey and West, for the East London Water-Works at Old Ford, and which were published in 1841. The dimensions and structure of the engine, and the details of the experiments, are stated with such minuteness and precision, that there is none...
Сторінка 12 - ... either obtained in a fluid state from the furnaces in which the iron ore has been reduced, or in the decarbonization and refinement of crude pig or finery iron, by remelting the pigs in a suitable furnace so as to obtain fluid metal capable of being treated by the process we are about to describe. This consists, firstly, in running the fluid iron from the furnace into a close or nearly close vessel or chamber, formed of iron, perforated with openings to receive the tuyeres, and lined with firebrick...
Сторінка 52 - ... under which these phenomena take place. We must -first mention the manner in which heat is conveyed from place to place. This may occur in three different ways, — by radiation, by conduction, and by convection. By the first method we understand the heat to be propagated through gaseous matter ; thus, if we hold our hand in the neighborhood of a heated body we experience a sensation of warmth, the heat being radiated, as it is termed, through the air and communicated to the hand. The term conduction...