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acid action apparatus appears applied attached axis becomes body boiler bottom called carried cast cause centre close colour common connected considerable consists construction containing copper covered cylinder described diameter direction drawing effect employed engine equal extremity feet figure fire fixed fluid force four frame furnace give given glass half heat hole inches invention iron kind lead length lever liquid lower machine manner matter means metal method motion mould obtained operation passing piece pipe placed plate portion prepared pressure prevent produced proportion quantity raised receive removed render represents rise round screw separate shown side similar spring square steam substance sufficient supported surface taken tube turned upper usually valve various vessel weight wheel whole wood
Sayfa 472 - Air is a mixture of two gases, — oxygen and nitrogen, — in the proportion of one part of the former to four of the latter. Oxygen is the active gas, the feeding and warming gas, the life-giving principle of nature. It has been well named "the great supporter of animal life.
Sayfa 361 - When pieces of charcoal about an inch long and onesixth of an inch in diameter, were brought near each other (within the thirtieth or fortieth part of an inch) a bright spark was produced, and more than half the volume of the charcoal became ignited to whiteness, and by withdrawing the points from each other a constant discharge took place through the heated air, in a space equal at least to four inches, producing a most brilliant ascending arch of light, broad, and conical in form in the middle.
Sayfa 570 - Commons was appointed in 1819, "to inquire how far it might be practicable to compel persons using steam engines and furnaces in their different works, to erect them in a manner less prejudicial to public health and comfort, and to report their observations thereupon to the House.
Sayfa 361 - When any substance was introduced into this arch, it instantly became ignited ; platina melted as readily in it as wax in the flame of a common candle ; quartz, the sapphire, magnesia, lime, all entered into fusion...
Sayfa 338 - Multiply the weight of the several particles by the squares of their distances from the centre of motion, and divide the sum of the products by the weight of the whole mass...
Sayfa 429 - DELFT- WARE is a kind of pottery covered with an enamel or white glazing, which gives it the appearance and neatness of porcelain, some kinds of this enamelled pottery...
Sayfa 646 - Now by marking the number of grains of water held by the narrow tube be on a graduated scale attached to it, we can find at once what is the weight of a quantity of water equal in bulk to the solid matter in the sand, and by comparing this with the weight of the sand, we have its true specific gravity.
Sayfa 662 - For this purpose, the work man turns up the edge or brim, to the depth of about an inch and a half, and then returns the point back again through the centre or axis of the cap, so far as not to take out this fold of the same depth.
Sayfa 579 - ... such gallons shall be a bushel, and eight such bushels a quarter of corn or other dry goods, not measured by heaped measure.
Sayfa 335 - ... it cannot easily be seen, with gum mastic, the stone being previously made hot enough to melt it. By the same medium cameos of white enamel or coloured glass are often joined to a real stone as a ground, to produce the appearance of an onyx. Mastic is likewise used to cement false bucks or doublets to stones, to alter their hue.