_Sic undique omni ratione concluditur, mente consilioque divino omnia in hoc mundo ad salutem omnium conservationemque administrari. Quo Spectaculo nihil potest admirabilius esse, nihil pulchrius. Quid tam apertum, tamque perspicuum, cùm cœlum suspeximus, cælestiaque contemplati sumus, quàm aliquod esse Numen præstantissimæ mentis, qua hæc regantur?_ CIC. DE NAT. DEOR. _Heads of Mr. Walker, sen.’s_ Lectures, IN CONDUIT-STREET, HANOVER-SQUARE, Read every Monday, Wednesday, & Friday, during Winter, AT ONE, _On an Explanatory Apparatus_, The most extensive and elegant. ONE GUINEA THE COURSE. I. On the general Properties of Matter, Magnetism, &c. II. On the Laws of Motion, Mechanics, Machines of Agriculture, Mills, Cranes, &c. III. On the Principles of Chemistry. IV. On Pneumatics, or the Weight and Spring of the Air, Musical Vibrations, &c. V. On the Gasses and new Discoveries in the Air. VI. On the Hydrostatics, or the Motion and Pressure of Water, Canals, Aqueducts, Machines, Ships, &c. VII. On Electricity, its Laws, Effects, Circuits, Shocks, &c. VIII. Ditto, negative and positive, Lightning, Thunder, Galvanism, Medical Electricity, &c. IX. On Optics, Laws of Light, Vision, Lenses, &c. X. On the Figure and Motions of the Earth. XI. On the Phases, Eclipses, &c. of the Moon, and on the Tides. XII. On the Solar System in general, with the new Discoveries. This Course may be read privately for 50 Guineas, or to General Subscription amounting to 70 Guineas, on application to Mess. Walker, sen. or jun. Ipswich: printed by Burrell & Bransby. End of the Project Gutenberg EBook of An epitome of astronomy, with the new discoveries, by W. Walker