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amount angle angular velocity assume atmosphere atoms attraction axis body Boyle's Law calculated called carbonic acid Cavendish experiment centre ceteris paribus compressibility contour lines corpuscules cube curvature curve cylinder definite density determined diffusion dimensions direction distance earth effect elastic energy equal experimental experiments fact film fluid gases give given glass gravitation greater heat Hence hodograph homogeneous Hooke's law horizontal hydrogen hydrostatic hydrostatic pressure hypothesis inch increase inertia kind kinetic theory layer length liquid Mariotte mass matter measured mercury molecular forces molecules moment of inertia motion Newton's obtained ordinary origin parallel particles perpendicular piezometer plane position pressure produced properties proportional quantity radius ratio rigidity rotation shows side solid space speed sphere spherical square stress substance suppose surface surface-tension temperature tension theory tion torsion tube unit vapour velocity vertical vessel vibration viscosity volume weight whole wire Young's modulus
Page 91 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 110 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Page 132 - That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall into it. Gravity must be caused by an agent acting constantly according to certain laws, but whether this agent...
Page 157 - A Defence of the Doctrine touching the spring and weight of the air ... against the objections of Franciscus Linus, etc.
Page 131 - It is inconceivable that inanimate brute matter should without the mediation of something else, which is not material, operate upon and affect other matter without mutual contact, as it must be if gravitation, in the sense of Epicurus, be essential and inherent in it.
Page 131 - You sometimes speak of gravity as essential and inherent to matter. Pray do not ascribe that notion to me; for the cause of gravity is what I do not pretend to know, and therefore would take more time to consider of it.
Page 160 - The number of equal spaces in the shorter leg, that contained the same parcel of air diversely extended. B. The height of the mercurial cylinder in the longer leg, that compressed the air into those dimensions. C. The height of the mercurial cylinder, that counterbalanced the pressure of the atmosphere. D. The aggregate of the two last columns, B and C, exhibiting the pressure sustained by the included air. E. What that pressure should be according to the hypothesis, that supposes the pressures and...
Page 305 - But that there should be exactly so much matter, and no more, in every molecule of hydrogen, is a fact of a very different order. We have here a particular distribution of matter, a collocation — to use the expression of Dr. Chalmers — of things which we have no difficulty in imagining to have been arranged otherwise.
Page 288 - Spencer records his conviction that 'the chemical atoms are produced from the true or physical atoms by processes of evolution under conditions which chemistry has not yet been able to produce.
Page 88 - ... wick, gives but little of the yellow light; while if the wick be of cotton it gives a considerable quantity, and that for an unlimited time. (I have found other instances of a change of colour in flames, owing to the mere presence of the substance, which suffers no diminution in consequence. Thus a particle of muriate of lime on the wick of a spirit-lamp will produce a quantity of red and green rays for a whole evening without being itself