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 4U.S. Government Printing Office, 1870 |
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arches armature arrangement asphalt Austria battery Belgium béton bitumen blocks boiler bolts bottom brick building canal cement cent Company compound wire concrete construction copper cost crib cubic cubic metres cylinder diameter dispatches distance dredges dwellings electric electric telegraph electro-magnet employed engine English exhibited Exposition feet floor four France French furnished galvanized horizontal hour houses hundred hydraulic hydraulic lime improvement inches inches thick instruments insulator invention iron lake length letter lever lime machine magnet mastic materials Messrs meters metres miles minute mode Morse apparatus Morse code Morse system motion Mulhouse operation ordinary ornamented Paris pipe piston placed plaster Plate pounds Prussia pump rails railway ratchet-wheel ratus revolutions per minute roads roof sand screw semaphore shaft side Siemens specimens speed steam steel stone surface terra cotta tion transmission transmitted trepan tube tunnel United valves walls weight wheel
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Page 10 - But be this as it may, the fact, that the magnetic action of a current from a trough is, at least, not sensibly diminished by passing through a long wire, is directly applicable to Mr. Barlow's project of forming an electro-magnetic telegraph;* and it is also of material consequence in the construction of the galvanic coil.
Page 13 - Now, recalling for an instant the fundamental law of floating bodies — namely, that the weight of the water displaced is equal to the weight of the...
Page 27 - What these relations shall be is one of the most interesting, and, at the same time, one of the most difficult, of the many problems with which we, or our successors, must deal.
Page 65 - A clean, fresh, and well-ordered house exercises over its inmates a moral no less than a physical influence, and has a direct tendency to make the members of a family sober, peaceable, and considerate of the feelings and happiness of each other...
Page 65 - ... a filthy, squalid, unwholesome dwelling, in which none of the decencies common to society, even in the lowest stage of civilization, are or can be observed, tends directly to make every dweller in such a hovel regardless of the feelings and happiness of each other, selfish, and sensual; and the connection is obvious between the constant indulgence of appetites and passions of this class, and the formation of habits of idleness, dishonesty, debauchery, and violence — in a word, the training...
Page 25 - The cam being very sharp, the movements of ascent and descent are proportionally rapid, and the paper touches the type during only an infinitely short space of time. The axis continuing to turn, the cam meets the arm b and depresses it, causing the click to draw round the cylinder and advance the paper a certain distance. By the side of the ratchet-wheel i
Page 161 - electric fire " would have a circuit of some thousands of miles to go. All this was upon the supposition or assumption that the electric fire would choose a continuous water conductor rather than to return or pass through the earth. Franklin presented a paper in reply, in which he says " the proposed experiment (though well imagined and very ingenious) of sending the spark round through a vast length of space, etc.
Page 35 - Om.20, and it gives 200 blows per minute. This machine is single-acting. The compressed air enters by the opening in constant communication by the conduit with the front part of the cylinder; when the piston is at the end of its stroke the slide opens the inlet port, and the piston only advances in consequence of the difference of the pressure of air on its back face fitted with a slender rod, and on its internal face, of which the section is reduced by the large shaft of the tool-carrier.
Page 26 - ... into the line circuit. The current passes through the vertical shaft, the coils of the magnet, and line wire to the other station, where it circulates in the coils of the magnet, the vertical shaft, &c., and goes to earth. " In traversing the coils of the magnets of both instruments, the current weakens the attractions of the armatures to the poles of the electromagnets ; the former are forced off by the spring, the screws d' are raised and the levers L at the same time depressed. The pallets...
Page 51 - ... this machine is very simple. The workman on the platform turns a wheel so as to bring the pick into the proper direction; he then opens a 'cock admitting compressed air into the cylinder by working the slide with a lever. The machine being thus set in motion, it is merely requisite to move it forward to follow up the work done by the pick. The air, on leaving the cylinder, escapes freely into the gallery. We subjoin the reported results of experiments made by this machine in two mines in England...