A manual of natural philosophy, by J.L. Comstock and R.D. Hoblyn

air-pump angle appear atmosphere attraction axis ball boat boiling bulk called centre of gravity centrifugal force circle cold colours concave concave mirror condensation conductor consequently convex convex lens convex mirror cylinder degrees density diameter direction distance earth eclipse ecliptic effect elastic electricity equal Explain Fig falling body feet fluid force fulcrum glass greater heat Hence illustrated inches inclined plane increased instrument latent heat length lens lever liquid machine magnet mercury metals miles mirror moon motion move object orbit particles pass pendulum perpendicular piece piston placed poles pounds pressure principle produced proportion pulley pump quantity of matter raised rays of light reflected reflecting telescope refraction respect retina revolution revolve rope round screw seen side solid space specific gravity steam substances Suppose surface temperature thermometer thrown tion tube valve velocity vessel vibrations visual angle weight wheel wire