The Intellectual Rise in Electricity: A HistoryLongmans, Green & Company, 1895 - 611 páginas |
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Página viii
... variation by the Magnetic Rocks . · The voyages of Vasco da Gama and Magellan . Peregrinus ' disclosure of the magnetic field of force . Hartmann partly recognizes Dip of the Compass needle Norman's discovery and explanation of Dip ...
... variation by the Magnetic Rocks . · The voyages of Vasco da Gama and Magellan . Peregrinus ' disclosure of the magnetic field of force . Hartmann partly recognizes Dip of the Compass needle Norman's discovery and explanation of Dip ...
Página 57
... variations , due to reg- ular daily , monthly , yearly and centennial changes in the earth's magnetic field , which controls it . Hence , the task of figuring backward the probable position of the needle at the time of the building of ...
... variations , due to reg- ular daily , monthly , yearly and centennial changes in the earth's magnetic field , which controls it . Hence , the task of figuring backward the probable position of the needle at the time of the building of ...
Página 58
... variation of these faces from the true astronomical direction . Accidental mechanical imperfec- tions in pivoting the needle , or in the shape of the latter , might easily result in far greater error . The assumption that an instrument ...
... variation of these faces from the true astronomical direction . Accidental mechanical imperfec- tions in pivoting the needle , or in the shape of the latter , might easily result in far greater error . The assumption that an instrument ...
Página 69
... variations , the final statement being that " the duke gave them five close carriages , each of which was so constructed as to point to the south ; the ambassa- dors mounted these , and , passing through Foo - nan and Lin - yih to the ...
... variations , the final statement being that " the duke gave them five close carriages , each of which was so constructed as to point to the south ; the ambassa- dors mounted these , and , passing through Foo - nan and Lin - yih to the ...
Página 76
... variation of the needle excepted ) existed in undoubted connection with the nau- tical compass in Europe at a closely approximate period ; and second , that in the before quoted description of two instruments no nautical employment of ...
... variation of the needle excepted ) existed in undoubted connection with the nau- tical compass in Europe at a closely approximate period ; and second , that in the before quoted description of two instruments no nautical employment of ...
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Términos y frases comunes
amber ancient appears Arabs Aristotle asserts attractive power Bacon became believed bodies Boyle Cabæus Cardan cause century Chinese compass needle Descartes direction discovery doctrine draw earth effect Egyptian electric electrified Etruscans existence experiments fact field of force followed Fracastorio Galileo Gilbert glass globe Greek Guericke hand heat heavens hence Hist hypothesis induction invention iron Klaproth knowledge known learned light lodestone London Lucretius magnetic attraction magnetite matter ment merely metal modern motion moved nature navigation Neckam netic north pole observed Olaus Magnus original Paracelsus Peregrinus phenomena philosophers physical polarity Pole star Porta probably Ptolemy reason regarded repelled ring Robert Boyle Robert Hooke Royal rubbed Samothrace Sarpi says ships sphere stone substance terrella Thales Theophrastus theory things tion treatise tube turn variation vessel virtue voyages William Gilbert writing
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Página 569 - I'd divide, And burn in many places ; on the top-mast. The yards, and bowsprit, would I flame distinctly, Then meet, and join. Jove's lightnings, the precursors O' the dreadful thunder-claps, more momentary And sight-out-running were not.
Página 5 - OUTLINES OF THEORETICAL CHEMISTRY. By LOTHAR MEYER, Professor of Chemistry in the University of Tubingen. Translated by Professors P. PHILLIPS BEDSON, D.Sc., and W. CARLETON WILLIAMS, B.Sc. 8vo., 9s. MILLER. -INTRODUCTION TO THE STUDY OF INORGANIC CHEMISTRY.
Página 419 - Heat is a very brisk agitation of the insensible parts of the object, which produces in us that sensation from whence we denominate the object hot ; so what in our sensation is heat, in the object is nothing but motion.
Página 9 - SMITH.— GRAPHICS, or the Art of Calculation by Drawing Lines, applied especially to Mechanical Engineering. By ROBERT H. SMITH, Professor of Engineering, Mason College, Birmingham. Part I. With separate Atlas of 29 Plates containing 97 Diagrams. 8vo. , 15$.