Lectures of experimental philosophy. [electronic resource] : Wherein The Principles of Mechanicks, Hydrostaticks, and Opticks, are Demonstrated and Explained at large, by a great Number of curious Experiments: With a Description of the Air-Pump, and the several Experiments thereon: Of the Condensing-Engine; as also of the different Species of Barometers, Thermometers, and Hygrometers; with several Experiments to prove and explain Sir Isaac Newton's Theory of Light and Colours, as performed in a Course of Mechanical and Experimental Philosophy. By J. T. Desaguliers, M. A. F. R. S. Illustrated with several curious Copper Plates suitable to each Subject. To which is added, a description of Mr. Rowley's Machine, called the orrery, which represents the Motion of the Moon about the Earth, Venus and Mercury about the Sun, according to the Copernican System: All carefully Examined and Corrected by Mr. Desaguliens.