Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1879 |
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10th irritations 1st irritations 30 cent 3d irritations 4th irritations Academy Agassiz Alfred Vail alphabet apparatus Ascending polarization audibility axis Baron Schilling battery Block Island Capt cell centimetres chord circuit coil collections Condorcet connection Daboll trumpet Daniel Daniel cells direction discovery distance echo effect electric telegraph electro-magnetic telegraph experiments fact feet Fish Commission fog-signal galvanic galvanometer George's Bank heard heat Henry's inches increased instrument invention investigations irritating current irritations.-Salt solution Island letter light-house Light-House Board magnet ment miles minutes Mistletoe Morse's needle nerve observed obtained patent periment phenomena polarizing current produced Prof Professor Henry Professor Morse Rana esculenta Rana temporaria Remarks rheo rheochord Samuel F. B. Morse schooner scientific Secretary signal siren Smithsonian Institution Smithsonian Report Society sound sound-wave species specimens station steam steamer surface temperature tion trumpet United States Fish velocity vessel Washington whistle wind wire York
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Сторінка 153 - ... as they shall deem best suited for the promotion of the purpose of the testator, anything herein contained to the contrary notwithstanding.
Сторінка 287 - ... intensity and quantity magnets were introduced to avoid circumlocution, and were intended to be used merely in a technical sense. By the intensity magnet I designated a piece of soft iron so surrounded with wire that its magnetic power could be called into operation by an intensity battery ; and by a quantity magnet a piece of iron so surrounded by a number of separate coils that its magnetism could be fully developed by a quantity battery.
Сторінка 345 - It was my wish, in every statement, to render Mr. Morse full and scrupulous justice. While I was constrained, therefore, to state that he had made no discoveries in science, I distinctly declared that he was entitled to the merit of combining and applying the discoveries of others, in the invention of the best practical form of the magnetic telegraph. My testimony tended to establish the fact that, though not entitled to the exclusive use of the electro-magnet for telegraphic purposes, he was entitled...
Сторінка 264 - Lucretius, gives an account of a chimerical correspondence between two friends by the help of a certain loadstone, which had such a virtue in it, that if it touched two several needles, when one of the needles so touched began to move, the other, though at never so great a distance, moved at the same time, and in the same manner.
Сторінка 300 - Up to the autumn of 1837 my telegraphic apparatus existed in so rude a form that I felt a reluctance to have it seen. My means were very limited — so limited as to preclude the possibility of constructing an apparatus of such mechanical finish as to warrant my success in venturing upon its public exhibition. I had no wish to expose to ridicule the representative of so many hours of...
Сторінка 171 - Contributions to Electricity and Magnetism. No. II. On the influence of a Spiral Conductor in increasing the intensity of Electricity from a Galvanic arrangement of a single Pair, etc.
Сторінка 37 - Sydney : The Mammals of Australia, illustrated by Miss Harriett Scott and Mrs. Helena Forde. With a short account of all the species hitherto described. By Gerard Krefft.
Сторінка 166 - It is, however, more in accordance with all the phenomena of cohesion to suppose, instead of the attraction of the liquid being neutralized by the heat, that the effect of this agent is merely to neutralize the polarity of the molecules so as to give them perfect freedom of motion around every imaginable axis.
Сторінка 159 - At the same time he developed the relation of the intensity magnet to the intensity battery, and their relations to the magnet of quantity. He thus made the electro-magnet capable of transmitting power to a long distance, demonstrated the principle and perfected the magnet applicable to the purpose, was the first actually to magnetize a piece of iron at a distance, and to demonstrate and declare the applicability of the electro-magnet to telegraphy at a distance. Using the terminal short-circuit...
Сторінка 312 - The applicant shall make oath that he does verily believe himself to be the original and first inventor or discoverer of the art, machine, manufacture, composition, or improvement for which he solicits a patent...