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1st irritations 3d irritations 4th irritations Academy American animals apparatus appears application arrangement Bank battery Board cause cell cent character circuit collections Commission condition Condorcet connection continued course Daniel direction distance effect electric electro-magnetic entirely established excitability experiments fact feet galvanic give given greater heard heat Henry important inches increased indicated Institution interest invention Island length less letter light-house magnet means miles minutes Morse Museum natural nearly nerve NOTE observed obtained operation original passed polarization practical present produced Prof Professor published question Rana temporaria received reference regard Remarks Report Representatives rheochord scientific Secretary side signal Smithsonian Society sound species specimens station success surface telegraph tion trumpet United States Fish University vessel Washington whistle wind wire York
Page 264 - Upon their separating from one another into distant countries, they agreed to withdraw themselves punctually into their closets at a certain hour of the day, and to converse with one another by means of this their invention.
Page 287 - ... 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.
Page 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...
Page 22 - III. A. — On the Distribution of the Fishes of the Alleghany Region of South Carolina, Georgia, and Tennessee, with descriptions of new or little known species.
Page 265 - In electricity he has made a remarkable discovery; you write two or three words on a paper; he takes it with him into a room, and turns a machine enclosed in a cylindrical case, at the top of which is an electrometer, a small fine...
Page 125 - RESOLUTION for the appointment of Regents of the Smithsonian Institution. Resolved by the Senate and House of Representatives of the United States of America in Congress assembled, That the vacancies in the Board of Regents of the Smithsonian Institution of the class "other than members of Congress" be filled by the appointment of Theodore D.
Page 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.
Page 159 - ... first to prove by actual experiment that, in order to develop magnetic power at a distance, a galvanic battery of intensity must be employed to project the current through the long conductor, and that a magnet surrounded by many turns of one long wire must be used to receive this current.
Page 281 - Shortly after the publication mentioned, several other applications of the coil, besides those described in that paper, were made in order to increase the size of electro-magnetic apparatus, and to diminish the necessary galvanic power. The most interesting of these was its application to a development of magnetism in soft iron, much more extensive than to my knowledge had been previously effected by a small galvanic element.