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Academy afterward algebra analysis of infinites ancient angle appeared applied arabs Archimedes arithmetic astro astronomy axis blems bodies calculation Cartes celebrated celestial century CHAP circle Clairaut comets conic sections considered curve cycloid Daniel Bernoulli degree demonstrated determined diameter differential calculus differential equations discovery Earth ecliptic ellipsis employed equal equilibrium Euler fluid Galileo gave genius geometricians geometry given glass greeks Hipparchus honour Huygens invention isochronous curve James Bernoulli John Bernoulli Jupiter known laws Leibnitz length likewise lunar mathematicians mathematics maxima and minima means mechanics meridian method of fluxions Moon motion nature Newton Nicholas Bernoulli object observations optics orbit particular planets principle problem progress proportion proposed Ptolemy published quadratures quantity ratio rays refraction resolved respect revolution right line round simple solar solid solution spherical spheroid square stars supposed tangents telescope theory tion treatise truth velocity
Page 61 - ... any account of them in writing. For he considered all attention to Mechanics, and every art that ministers to common uses, as mean and sordid, and placed his whole delight in those intellectual speculations, which, without any relation to the necessities of life, have an intrinsic excellence arising from truth and demonstration only.
Page 163 - In the dial-plate there were twelve small windows, corresponding with the divisions of the hours. The hours were indicated by the opening of the windows, which let out little metallic balls, which struck the hour by falling upon a brazen bell.
Page 138 - AVhcu a summons is sent to me I will take this stone, and, placing myself in the sun, I will, though at a distance, melt all the writing of the summons.
Page 30 - ... to have led to the discoveries of other geometrical properties, as the conchoid of Nicomedes, the cissoid of Diocles, and the quadratrix of Dinostratus. This latter geometrician was the follower and friend of Plato, whose devotion to the science of geometry was such that he caused it to be inscribed over the door of his school, ' Let no one enter here who is ignorant of geometry.
Page 61 - Yet Archimedes had such a depth of understanding, such a dignity of sentiment, and so copious a fund of mathematical knowledge, that, though in the invention of these machines he gained the reputation of a man endowed with divine rather than human knowledge, yet he did not vouchsafe to leave any account of them in writing.
Page 65 - The reason is, all bodies lose some of their weight in a fluid, and the weight which a body loses in a fluid, is to its whole weight, as the specific gravity of the fluid is to that of the body.
Page 95 - Sunt Aries, Taurus, Gemini, Cancer. Leo, Virgo, Libraque, Scorpius, Arcitenens, Caper, Amphora, Pisces.
Page 297 - This is the same as saying that when a ray of light passes out of one medium into another, the...