Nature, Volume 47Sir Norman Lockyer Macmillan Journals Limited, 1893 - Electronic journals |
Contents
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Common terms and phrases
acid animals appears Archibald Geikie Astronomical azoimide Baddeleyite Berlin body bright British carbon cells centimetres chemical College colour comet contains corona crystals December deposits described earth electric engine ephemeris exhibited experiments fact feet genus geological give given heat heliacal rising illustrated important inches Institute interesting investigation larva larvæ lectures light lines liquid London magnetic matter means measure ment metal Metazoan meteoritic method Museum nature November object observations Observatory obtained osmotic pressure paper photographs plants plates pliocene present pressure probably produced Prof published quantity Quaternions question recent referred remarkable researches rocks Royal Geographical Society Royal Society scientific seen side solar solution South species specimens spectrum Sphenophyllum stars substance sulphuric acid surface temperature theory Thoth tiglic acid tion tube University vapour velocity volume
Popular passages
Page 297 - E il ciel, cui tanti lumi fanno bello, Dalla mente profonda che lui volve Prende l
Page 279 - Physics into the later years of the programme as a substantial subject, to be taught by the experimental or laboratory method, and to include exact weighing and measuring by the pupils themselves. " 3. The introduction of Elementary Algebra at an age not later than twelve years. "4. The introduction of Elementary Plane Geometry at an age not later than thirteen years.
Page 128 - ... the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of...
Page 128 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page 279 - The introduction of elementary natural history into the earlier years of the programme as a substantial subject, to be taught by demonstrations and practical exercises rather than from books. (2) The introduction of elementary physics into the later years of the programme as a substantial subject, to be taught by the experimental or laboratory method, and to include exact weighing and measuring by the pupils themselves.
Page 128 - Ohm, which has the value 10" in terms of the centimetre and the second •of time and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14'4521 grammes in mass, of a •constant cross sectional area, and of a length of 106-3 centimetres.
Page 128 - That the magnitudes of these standards should be determined on the electro-magnetic system of measurement with reference to the centimetre as unit of length, the gramme as unit of mass, and the second as unit of time, and that by the terms centimetre and gramme are meant the standards of those denominations deposited with the Board of Trade. 3. That the standard of electrical resistance should be denominated the ohm, and should have the value 1,000,000,000 in terms of the centimetre and second.
Page 48 - THE BEAUTIES OF NATURE AND THE WONDERS OF THE WORLD WE LIVE IN.
Page 108 - ... absolutely inconceivable supposition, as we shall presently see) to produce, by direct action simply as a magnet, any disturbance of terrestrial magnetic force sensible to the instruments of our magnetic observatories. Considering probabilities and possibilities as to the history of the earth from its beginning to the present time, I find it unimaginable but that terrestrial magnetism is due to the greatness and the rotation of the earth.
Page 233 - ... according to the judgment of the Royal Academy of Sciences of Turin, shall have made the most important and useful discovery, or published the most valuable work on physical and experimental science, natural history, mathematics, chemistry, physiology, and pathology, as well as geology, history, geography, and statistics.