Elementary Treatise on Natural Philosophy, Parte1

air-pump amount apparatus applied Archimedes atmospheric pressure axis balloon barometer barrel body bottom Boyle's law called capillary carbonic acid centre of gravity centre of mass centrifugal force cistern compressed condensing pump consequently corresponding cubic cubic metre curve cycloid cylinder denote density diminishes direction displaced distance earth effect employed equator equilibrium exerted experiment fact fall feet formula free surface gases grammes horizontal Hydrometers immersed inch increases inertia instrument intensity of gravity latter layer length lever liquid litre lower machine manometer means measured metre millimetres motion move observed obtained opening orifice oscillation parallel particles perpendicular phenomena physical piezometer piston plane point of application position principle produce proportional pump pump-barrel reservoir resultant rotation scale simple pendulum siphon solid specific gravity stop-cock stroke suppose suspended temperature thread tion tube upper upward pressure valve velocity vertical vessel vibration volume weight