Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1909 |
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Häufige Begriffe und Wortgruppen
acid aeroplane American amount Antarctic apparatus apparent magnitude Becquerel birds British bureau Carboniferous cent Cereus coast collection Congress Cordillera Cretaceous deposits distance Doctor earth electric elephant expedition explosive fact feet fish flocculus formation fossils genus geological glacial glaciers Government gun cotton heat Indian international exchange investigations Island June 30 kilometers known land lines Linné lower machine magnetic mass material meters method miles mountains National Museum Nile nitrate nitrocellulose nitroglycerin northern observations Observatory obtained Octavo Opuntia patent Peru photographs picric acid plane plants Plates Pleistocene polar Port Charcot powder present publications radio-active radium rays received recent record region river rocks scientific Secretary shells shows Skåne Smithsonian Institution solar southern species specimens spines spot stars surface temperature Thomson tion trinitrotoluene Tushratta United uranium valley Victoria Land volume Washington waves Zoological
Beliebte Passagen
Seite 743 - I often say that when you can measure what you are speaking about and express it in numbers you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be.
Seite 757 - It seems to me that the test of ' Do we or do we not understand a particular subject in physics ?' is : 'Can we make a mechanical model of it ? ' I have an immense admiration for Maxwell's mechanical model of electromagnetic induction.
Seite 160 - This is no mere dream of a visionary philosopher. All the requisites needed to bring it within the grasp of daily life are well within the possibilities of discovery, and are so reasonable and so clearly in the path of researches which are now being actively prosecuted in every capital of Europe, that we may any day expect to hear that they have emerged from the realms of speculation into those of sober fact.* . . . The purposes and problems of radiotelegraphy are admirably stated in the above.
Seite 159 - Here, then, is revealed the bewildering possibility of telegraphy without wires, posts, cables, or any of our present costly appliances. Granted a few reasonable postulates, the whole thing comes well within the realms of possible fulfilment.
Seite 109 - Service, all correspondence in regard to consular affairs, and such other duties as may be assigned to him from time to time by the Secretary.
Seite 109 - States be, and he is hereby, authorized, by and with the advice and consent of the Senate, to appoint one additional major to the first regiment of light dragoons, the regiment of light artillery, each regiment of infantry, and the rifle regiment, in the army of the United States...
Seite 636 - they are exceeding wise,' that they are ' but a feeble folk, yet make their houses in the rocks.
Seite 745 - Within a finite period of time past, the earth must have been, and within a finite period of time to come, the earth must again be, unfit for the habitation of man as at present constituted, unless operations have been, or are to be performed, which are impossible under the laws to which the known operations going on at present in the material world are subject.
Seite 104 - For continuing the preservation, exhibition, and increase of the collections from the surveying and exploring expeditions of the Government, and from other sources...
Seite 745 - There is at present in the material world a universal tendency to the dissipation of mechanical energy. 2. Any restoration of mechanical energy, without more than an equivalent of dissipation, is impossible in inanimate material processes, and is probably never effected by means of organized matter either endowed with vegetable life or subjected to the will of an animated creature. 3. Within a finite...