Report of the ... Meeting of the British Association for the Advancement of Science, Volume 7J. Murray, 1838 |
Contents
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Common terms and phrases
acid Ahmednuggur appear average bar 4 ft basalt beegahs Breadth British broke carbonate Carron Iron cast iron cent centre coal Coed-Talon cold blast iron Corrected depth crystals cultivators cylinder d'in Deflection in inches Depth 4 inches Depth of bar dewing point Dharwar directly at Station Distance between supports Donaldson-Transit Dukhun Eenam Erman Experiment feet fluid Ghats grains Hamil Hansteen & Due Hot Blast Iron Humboldt inch square inches intensity Khandesh land limestone Load removed magnetic Mahratta Mean miles Moosulmans nearly needle observed directly Pateel phænomena Poona Collectorate population prisms produced protrusion of solid ratio reas revenue river river Dee rupees Russell Sahyer sandstone sec.y seer solid parallelopipedon species Specific gravity specimens square miles ß Patrick Statical level observed strata strength surface temperature Transits observed Triangular channel Ultimate deflec velocity villages Weight in lbs whole y Hamil y'in
Popular passages
Page v - The Officers and Members of the Councils, or Managing Committees, of Philosophical Institutions, shall be entitled, in like manner, to become Members of the Association. All Members of a Philosophical Institution recommended by its Council or Managing Committee, shall be entitled, in like manner, to become Members of the Association. Persons not belonging to such Institutions shall be elected by the General Committee or Council, to become...
Page v - To give a stronger impulse and a more systematic direction to scientific inquiry, — to promote the intercourse of those who cultivate Science in different parts of the British Empire, with one another and with foreign philosophers, — to obtain a more general attention to the objects of Science, and a removal of any disadvantages of a public kind which impede its progress.
Page 123 - Bradley's discoveries of the aberration of light and the nutation of the earth's axis, the photographic measurement of the heavens, Schwabe's work on the sunspot period, and Mr.
Page 83 - By the correction of his first opinion a new approximation is made to the truth, and by the repetition of the same process certainty is finally obtained. Thus theory and observation mutually assist one another; and the spirit of system, against which there are so many and so just complaints, appears nevertheless as the animating principle of inductive investigation. The business of sound philosophy is, not to extinguish this spirit, but to restrain and direct its efforts.
Page 2 - B tury, the bare fact of there being any difference whatsoever in the intensity of the magnetic force in different parts of the earth was unattested by a single published observation. The maps attached to this memoir exhibit the progress which investigation has made in the years that have since elapsed. They contain 753 distinct determinations, at 670 stations widely distributed over the earth's surface ; leaving, it is true, much still to be desired ; — but in what has been accomplished, leading...
Page 4 - Hence we could increase or diminish the lateral action by any means which affect the quantity of free electricity: — as by "an increase of the thickness of the glass, or by substituting for the small knob of the jar, a large ball. But the arrangement which produces the greatest effect is that of a long fine copper wire insulated, — parallel to the horizon, and terminated at each end by a small ball. When sparks are thrown on this from a globe of about a foot in diameter, the wire at each discharge...
Page 411 - By the transit of the wave the particles of the fluid arc raised from their places, transferred forwards in the direction of the motion of the wave, and permanently deposited at rest in a new place at a considerable distance from their original position. There is no retrogradation, no oscillation; the motion is all in the same direction, and the extent of the transference is equal throughout the whole depth. Hence this wave may be descriptively designated THE GREAT PRIMARY WAVE OF TRANSLATION.
Page 85 - ... quite assured that the completion of our knowledge of its distribution on the surface of the earth would be regarded by our contemporaries and by posterity as a fitting enterprise of a maritime people, and a worthy achievement of a nation which has ever sought to rank foremost in every arduous and honorable undertaking.
Page 3 - ... useful to give a somewhat detailed account of their construction and various adjustments, before entering on the plan of observation to be pursued. DECLINATION MAGNETOMETER. Construction. — The essential part of the declination magnetometer is a magnet bar, suspended by fibres of untwisted silk, and inclosed in a box, to protect it from the agitation of the air. The bar is a rectangular parallelepiped, 15 inches in length, §ths of an inch in breadth, and ^th of an inch in thickness. In addition...
Page 5 - Henry remarked, that it appeared necessary to add an additional postulate to our theory of the principle of electricity, — namely, a kind of momentum, or inertia, without weight ; by this he •would only be understood to express the classification or generalization of a number of facts, which would otherwise be insulated. To illustrate this, he stated that the same quantity of electricity could be made to remain on the wire if gradually communicated ; but when thrown on in the form of a spark,...