The Civil Engineer and Architect's Journal, Band 10

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Published for the proprietor, 1847
 

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Seite 241 - Arts, constituted by the Franklin Institute of the State of Pennsylvania for the promotion of the Mechanic Arts...
Seite 9 - We see it as Columbus saw America from the shores of Spain. Its movements have been felt trembling along the far-reaching line of our analysis, with a certainty hardly inferior to that of ocular demonstration.
Seite 219 - ... they were resting on the wire. Though accidents to the operators, from the direct discharge, may be prevented by the method before mentioned, yet the effect on the machine cannot be entirely obviated ; the residual current which escapes the discharge along the perpendicular wires, must neutralize for a moment the current of the battery, and produce irregularity of action in the apparatus. The direct discharge from the cloud on the wire is, comparatively, not a frequent occurrence, while the dynamic...
Seite 205 - Jones, the king's chief architect. Of the principal reformers of taste among the learned and noble men of this period, the great LORD CHANCELLOR BACON stands in the foremost rank ; and his published opinions on architecture and gardening, are decisive proofs of the correctness of his taste. His maxim, that houses are built to live in and not to look on...
Seite 174 - ... therefore interfere at certain points along the wire, producing, for a moment, waves of double magnitude, and will thus enhance the tendency of the fluid at these points to fly from the conductor. I do not say that the effects observed were actually produced in this way ; I merely wish to convey the idea that known principles of electrical action might, under certain circumstances, lead us to anticipate such results. 2. The state of the wire may be disturbed by the conduction of a current of...
Seite 218 - ... was entirely due to the repulsive action of the electricity in motion in the upper wire on the natural electricity of the lower. In another experiment, two wires, about 400 feet long, were stretched parallel to each other between two buildings ; a spark of electricity sent through one produced a current in the other, though the two were separated to the distance of 300 feet ; and from all the experiments, it was concluded that the distance might be indefinitely increased, provided the wires were...
Seite 84 - Tauri), as occupying exactly or nearly the position of the centre of gravity, and as entitled to be called the Central Sun. Assuming Bessel's parallax of the star 61 Cygni, long since remarkable for its large proper motion, to be correctly determined...
Seite 249 - The theory was now left in greater doubt than ever; and suspicion fell even on the accuracy of the reductions of the observations. " ' A few years since, as is well known to members of the British Association, the British Government, at the representation of the Association, sanctioned the complete reduction, on an uniform plan, of all the observations of the moon made at the Royal Observatory of Greenwich since the year 1750 : and the immediate superintendence of this work was undertaken by the...
Seite 228 - Francis Bowes Stevens, of Hoboken, in the county of Hudson, in the State of New Jersey, in the United States of America, engineer, for improvements in applying means and apparatus to ships and vessels to improve their speed, — being a communication.
Seite 174 - ... body, for the same reason that the charged conductor of the machine gives off a spark under the same circumstances. It might at first be supposed that the redundant electricity of the conductor would exhaust itself in giving off the first spark, and that a second discharge could not take place; but it should be observed, that the wave of free electricity, in its passage, is constantly attracted to the wire by the portion of the uncharged conductor which immediately precedes its position at any...

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