Scientific Writings of Joseph Henry, Volumen30,Tema 1Smithsonian institution, 1886 |
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Scientific Writings of Joseph Henry Joseph Henry,Smithsonian Institution Sin vista previa disponible - 2016 |
Términos y frases comunes
acid American Philosophical Society apparatus appears arrangement aurora axis bell boiler Cayuga lake circuit coil conductor connected copper current electricity cylinder Daboll trumpet deflagration deflection diminished discharge distance effect electricity elevation engine exhibited fact feeble feet fog-signals galvanometer given greater heard heat helix Hudson hypothesis inch in diameter increased induced current inductive action Institution instrument intensity interposed investigations Lake Lake Erie Lake Ontario length Leyden jar light light-house Light-House Board long wire magnet matter ment mentioned metal miles minutes Mistletoe Mohawk river motion nearly needle neutralize observed obtained opposite direction passed penetrating power phenomena plate poles pressure primary current principles produced Professor Henry quantity reference ribbon river secondary current Seneca lake series of experiments shock signal siren sound spark spiral steam steamer surface thick tion tricity trumpet valley velocity vessel whistle whole wind zinc
Pasajes populares
Página 264 - The property is bequeathed to the United States of America, "to found at Washington, under the name of the SMITHSONIAN INSTITUTION, an establishment for the increase and diffusion of knowledge among men.
Página 266 - To stimulate men of talent to make original researches, by offering suitable rewards for memoirs containing new truths; and, 2. To appropriate annually a portion of the income for particular researches, under the direction of suitable persons. TO DIFFUSE KNOWLEDGE. It IS proposed — 1. To publish a series of periodical reports on the progress of the different branches of knowledge ; and, 2. To publish occasionally separate treatises on subjects of general interest.
Página 282 - The present time appears to be peculiarly auspicious for commencing an enterprise of the proposed kind. The citizens of the United States are now scattered over every part of the southern and western...
Página 268 - Some of the reports may be published annually, others at longer intervals, as the income of the Institution or the changes in the branches of knowledge may indicate. 2. The reports are to be prepared by collaborators eminent in the different branches of knowledge.
Página 266 - Each memoir presented to the Institution to be submitted for examination to a commission of persons of reputation for learning in the branch to which the memoir pertains ; and to be accepted for publication only in case the report of this commission is favorable.
Página 265 - ... diffused among men by means of the press. 8. To effect the greatest amount of good, the organization should be such as to enable the Institution to produce results, in the way of increasing and diffusing knowledge, which cannot be produced either at all or so efficiently by the existing institutions in our country.
Página 270 - It is believed that the collections in natural history will increase by donation as rapidly as the income of the Institution can make provision for their reception, and, therefore, it will seldom be necessary to purchase articles of this kind.
Página 201 - ... us to admit the existence of a principal discharge in one direction and then several reflex actions backward and forward each more feeble than the preceding, until the equilibrium is obtained. All the facts are shown to be in accordance with this hypothesis, and a ready explanation is afforded by it of a number of phenomena, which are to be found in the older works on electricity, but which have until this time remained unexplained."* The italics are Henry's.
Página 42 - ... telegraph; and it is also of material consequence in the construction of the galvanic coil. From these experiments it is evident that In forming the coil we may either use one very long wire or several shorter ones, as the circumstances may require; in the first case, our galvanic combinations must consist of a number of plates, so as to give ' projectile force; ' in the second it must be formed of a single pair.
Página 271 - The Secretary and his assistants, during the session of Congress, will be required to illustrate new discoveries in science, and to exhibit new objects of art; distinguished individuals should also be invited to give lectures on subjects of general interest.