Reports of the United States Commissioners to the Paris Universal Exposition, 1867: Published Under Direction of the Secretary of State by Authority of the Senate of the United States, Volume 3U.S. Government Printing Office, 1870 - Exposition universelle de 1867 à Paris |
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advantage amount angle apparatus applied armature atmosphere axis Bessemer process boiler calories carried centimetres circumference compression construction contrivance crank cubic cubic metres cylinder diameter direction discharge disk distance effect electric employed engine equal exhibited experiments Exposition extremity feet force furnace furnished glass half heat horizontal horse-power hundred hydraulic hydraulic head inches increased instrument introduced invention inventor iron kilograms kilometres latent heat length lever light light-houses liquid machine manufacture means mechanical ment Messrs metal metres millimetres mode motion movable types movement necessary object observed operation ordinary Paris passes piston plane plate position pounds present pressure prism produced pulley pump purpose quantity refrigerator reservoir revolution roller rotary engine rotation screw sextant shaft side Siemens space spherometer steam steam-engine steel surface telescope temperature tion tonometer tube turbine turn valve vapor velocity vertical vessel weight wheel Wicklow Head
Popular passages
Page 31 - B with the sound velocity where y is the ratio of the specific heat at constant pressure to the specific heat at constant volume, and p is the gas pressure.
Page 8 - Sometimes one came on groups of men who were saturating in water the rough bands of sacking in which they were enveloped before going to wrestle with some whiteheat forging, sometimes on men nearly naked, with the perspiration pouring from them, who had come to rest for a moment from the puddling furnaces, and to take a long drink of the thick oatmeal and water, which is all that they venture on during their labor, and which long experience has proved to be the most sustaining of all drinks under...
Page 480 - The compounds of carbon and hydrogen are so numerous that it has been found essential to provide an additional character to represent each. The letter r may be associated with the radiating and refracting power of carbon ; and carbar, or ar, as well as ac, will represent an atom of carbon. As ac might be mistaken for ak, in radical compounds, the carbon component is denoted generally by r. The only case in which it has been found advantageous to use one letter to designate two atoms is that of...
Page 306 - After tliis the stone is placed, for a longer or shorter time, according to the size of the object, under a shower bath of cold water. This is not, by bathing, to convert it into Bath stone, although were the Bath stone a sand stone instead of an oolitic formation, this name would do as well as any. The salt, or chloride of sodium, deposited throughout the interstices, is sought out and washed away, in brine, by the water, and were it not that a portion of undecomposed chloride of calcium is also...
Page 357 - ... provided for the purpose, and closed with plugs all around the top of the annular kiln, and the fineness of this dust is so adjusted to the height of the oven that it is consumed by entering into combustion before it reaches the oven floor. Each compartment of bricks or other objects is thus burn t in its turn, and so the process goes on continuously, the waste heat of the burning compartment continually drying the compartment before it, and taking all the heat of the compartment behind through...
Page 619 - It only now remains to be seen that, minute as arc the letters written by this machine, they are characterized by a clearness and precision of form which proves that the moving parts of the machine, while...
Page 481 - He who knows why he calls chloroform arlid, knows on the instant, and knows for life, that it is composed of one of carbon, one of hydrogen and three atoms of chlorine ; or when he designates laughing gas by genat, he announces at once several facts not indicated by the old names, nitrous oxide or protoxide of nitrogen.
Page 304 - The sand, a clean-grained, slightly brownish sort, just such as a dishonest grocer might select for increasing the gravity, speciflcor otherwise, of his sugar, comes from near Maidstone. There is no end to the quantity of it, and we believe it costs less than three shillings a ton in the Thames. There are flints enough for a hundred years to come brought up from the chalk pits at...
Page 352 - Hewitt upon iron and steel, &c. posed by the superposed strata ; they are, moreover, mixed with a quantity of steam which is drawn in through the grate from a constant supply of water maintained underneath the latter. The steam in contact with the incandescent coal also decomposes and produces hydrogen and carbonic oxide gas, which are mixed with the gases produced by the coal direct. The whole volume of these gases is then conducted to the furnace itself by means of wrought-iron pipes.
Page 351 - ... 45° to 60°, according to the nature of the fuel used. The inclined plane is solid about half way down, and below this it is constructed as a grate with horizontal bars. The openings for introducing the coal into the...