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An Explanation of the Construction and Method of Working the Magnetic Needle Telegraph An Explanation of the Mechanism and Uses of a general portable Microscope, first invented and made in the Year 1728; and Publish'd by His Majesty's Royal Letters Patent, February 17, 1742 An Explanation of the Nature of the Equation of Time, and Use of the Equation Table for Adjusting Watches and Clocks to the Motion of the Sun. Also, The Description of a Time-Keeper for Astronomical and Other Uses An Explanation of the Observed Irregularities in the Motion of Uranus, on the Hypothesis of Disturbances caused by a more Distant Planet; with a Determination of the Mass, Orbit, and Position of the Disturbing Body An explanatory dictionary of the apparatus and instruments employed in the various operations of philosophical and experimental chemistry : 2 entries An Explication of the Diall sett up in the King's Garden at London, in 1669. In which very many sorts of Dyalls are conteined: by which, besides the Houres of all kinds, etc. Shines An Exposition of some of the Laws and Phenomena of Magnetic Induction, with original Illustrative Experiments An Extension of the Double Altitude Problem to finding the Longitude as well as the Latitude at Sea An Extract from a Letter of the Rev. Mr John Hellins, formerly Assistant to Mr (now Dr) Maskelyne, the Astronomer Royal at Greenwich Observatory, to Francis Maseres, Esq. An Extract from a Letter of the Rev. Mr. John Hellins, formerly Assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. "An Extract of an account given by Mr. Flamstead of his own and Mr. Edmund Halleys Observations concerning the Spots in the Sun, appearing in July and August 1676" An Extract of some Physico-Mathematical Discourses contained in Mr. Cotes's Hydrostatical and Pneumatical Lectures: printed for the use of those that go the Course of Experiments "An Extract of the Journal des Scavans. of April 22 st. N. 1686. Giving an account of the two new Satellites of Saturn, discovered lately by Mr. Cassini at the Royal Observatory in Paris." "An Historical Account of the Trade Winds, and Monsoons, observable in the Seas between and near the Tropicks, with an attempt to assign the Phisical cause of the said Winds" An Historical and Descriptive Account of the various processes of the Daguerreotype and the Diorama, An Historical and Philosophical Account of the Barometer, or Weather-Glass. ... Are Assigned and Explained ... An Historical and Philosophical Account of the Barometer, or Weather-Glass. Wherein the Reason and Use of that Instrument, the Theory of the Atmosphere, and the Causes of its different Gravitation, are Assign'd and Explain'd. And a Modest Attempt from the An Historical and Philosophical Account of the Barometer, or Weather-Glass. Wherein the reason and use of that Instrument, the Theory of the Atmosphere, the Causes of its different Gravitation are assign'd and explain'd: and A Modest Attempt from thence m An Historical Review of the Nature and Results of Vaccination, as unfolded in Dr Baron's Life of Jenner An Historical Survey of the Astronomy of the Ancients
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