The Mathematical Principles of Natural Philosophy, 第 2 巻

afcent alfo alſo angle aphelion apogee arifing axis becauſe body cafe cauſe centre centripetal force circle Comet cylinder defcend defcrib'd defcribed denfity diameter difference diminiſhed diurnal motion duplicate ratio Earth ecliptic ellipfis equal equation faid fame ratio fatellite fcribed fecond femidiameter fide fimilar fince firft firſt fluid fome force of gravity fpace fquare fubduplicate fuch fuperficies fuppofe furface fyzygies given globe greater greateſt horary motion Hyperbola inches increaſed Jupiter latitude latus rectum leaft leffer lefs length mean diſtance mean motion meaſure medium Moon Moon's move muſt nearly nodes obfervations ofcillations orbit paffing Parabola particles pendulum perihelion perpendicular Planets pofition preffed preffure progreffion prop proportion PROPOSITION pulfes quadratures quantity radius reafon reciprocally rectangle refiftance reprefent reſiſtance revolve right line Saturn ſpace Sun's tail tangent thefe themſelves THEOREM theſe thofe thoſe thro tion veffel velocity vortex weight whofe whole whoſe