A Course of Lectures on Natural Philosophy and the Mechanical Arts, 第 1 卷

angle appears Archimedes astronomical atmosphere attraction axis body calculation capable cause centre of gravity centrifugal force cohesion colours considerable considered convex lens crown glass Daniel Bernoulli degree density determined diameter direction distance earth ecliptic effect elastic electricity ellipsis employed equal equilibrium experiments feet fixed fluid force friction glass greater heat Hipparchus horizontal inch inclined inclined plane increased instruments Jupiter kind length lens less light machine magnitude manner means measure mechanical medium mercury moon motion natural philosophy nature nearly object oblique observed orbit particles pendulum phenomena pipe planets Plate portion pressure principal produced properties proportion pump quantity rays reflection refraction remain resistance respect retina retrograde motion revolving side similar situation solid sometimes sound specific gravity stars steam substance sufficient sulfuret sun's supposed surface telescope temperature theory tides tion tube usually velocity vessel vibrations weight wheel whole