Philosophia Britannica [electronic resource] : or a new and comprehensive system of the Newtonian philosophy, astronomy and geography. In a course of twelve lectures, with notes, containing The Physical, Mechanical, Geometrical, and Experimental Proofs and Illustrations of all the Principal Propositions in every Branch of Natural Science. Also A particular Account of the Invention, Structure, Improvement and Uses of all the considerable Instruments, Engines, and Machines, With new Calculations relating to their Nature, Power, and Operation. The whole collected and methodized from all the principal authors, and public Memoirs to the present Year; and embellish'd with seventy-five copper-plates. By B. Martin. In two volumes.