The First Principles of Natural Philosophy

action of gravity angle ARTHUR HENFREY atmosphere body falling BOOKS PUBLISHED Botany called centre of gravity concave concave lens CONCHOLOGY constant force containing convex lens CRUSTACEA cylinder direction distance divergent earth's surface EDWARD FORBES EDWARD NEWMAN elastic fluids Engravings equilibrium exerted fluid pressure Foolscap 8vo force of gravity forces acting formed fulcrum Geology HISTORY OF BRITISH Illustrations inclined plane inversely JOHN VAN VOORST law of motion LEONARD JENYNS Lycia magnitude MANUAL mass of fluid mirror move NATURAL HISTORY object P. H. GOSSE parallel parallelogram PARALLELOGRAM OF FORCES particles passing PATERNOSTER ROW perpendicular pipe piston Post 8vo principle produced proportion Quadrupeds quantity of matter rays of light reflexion refracted represent retina royal 8vo Second Edition side space described species specific gravity straight line supposed to act tion triangle tube upwards valve velocity vertical vessel vols weight whole WILLIAM YARRELL Woodcuts