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On Burning Mirrors: The Arabic Translation of the Lost Greek Original "On Celestial Photography" On Certain Considerations connected with the Orbits of Comets "On certain Impressions of Cold transmitted from the Higher Atmosphere, with the Description of an Instrument adapted to measure them" "On Certain Phenomena of Rotatory Motion" "On Certain Properties of Mercator's Chart, ..." On Champlain's Astrolabe: Lost on the 7th June, 1613 and Found in August, 1867, considered in solution of an obscurity in his journal of his first voyage up the Ottowa; and the great antiquityof astrolabes, and origin of their graduation "On Collecting Vinciana: The Dibner Collection at Brandeis University" "On competition between different species of graminivorous insects" "On Deducing the Longitude from an Observed Occultation of a Fixed Star by the Moon" "On Determining Innumerable Portions of a Sphere, the Solidities and Spherical Superficies of which Portions are at the same time Algebraically Assignable" 'On Developments of Spectroscopic Apparatus in the Nineteenth Century' "On Differences and Differential Functions of Zero" "On Dinornis (Part II) containing Descriptions of portions of the Skull, the Sternum and other parts of the Skeleton of the species previously determined, with osteological evidences of three additional Species, and of a new Genus, Palapteryx" "On Dinornis (Part III): containing a Description of the Skull and Beak of that genus, and of the same characteristic parts of Palapteryx, and of two other genera of Birds, Notornis and Nestor; forming part of an extensive series of Ornithic remains disco "On Dinornis, an extinct Genus of tridactyle Struthious Birds, with descriptions of portions of the Skeleton of five Species which formerly existed in New Zealand. (Part I)" On Divers Arts: The Treatise of Theophilus On Education in the Principles of Art "On Electrical Currents circulating near the Earth's Surface, and their connection with the Phenomena of the Aurora Borealis" On Encke's Comet. Encke's Dissertation contained in no. CCX and CCXI of the 'Astronomische Nachrichten'. Translated from the German "On English Amber, and amber generally" "On Evaporation from a Circular Water Surface" On Eye-pieces for Telescopes and Microscopes On Facility of Intercourse "On five hitherto unrecovered copies of Jean Rey's "Essays" of 1630" On Forgotten Sources in the History of Science "On Graphical Methods of determining the Local or Greenwich Time of Sunset at different places within a given region" On Great Telescopes of the Future On Hypsometrical Measurements by means of the Barometer and the Boiling-Point Thermometer, ... "On Improvement in Meteorological Registration" "On John Rowley's Orrery" On Laboratory Arts On M. Hansteen's recent Magnetic Observations in Siberia. In a Letter to Professor Renwick of New York On Magnetism, Voltaic Electricity, and Electro-Dynamics. For the Use of Beginners "On making Telescope Tubes in the 17th Century (An Anonymous Italian Manuscript)" On Microscopes and Optics On Microscopical Manipulation, Being the Subject-Matter of a Course of Lectures Delivered before the Quekett Microscopical Club, January-April 1869 On my friend Mr. Silvanus Morgan, his Book of Dialling On Necessary and Contingent Truth: Considered in regard to some Primary Principles of Mathematical and Mechanical Science On New Tables of the Moon's Parallax to be substituted for those of Burckhardt On Occulting micrometers and their Value as applied to Exact Astronomical Measurements "On Optical Apparatus Used in Lighthouses" "On Period Relations in Babylonian Astronomy" "On Period-relations in Babylonian Astronomy" "On Plimpton 322. Pythagorean Numbers in Babylonian Mathematics" On pocket sundials : 2 entries On Poisons in relation to Medical Jurisprudence and Medicine On Polishing the Specula of Reflecting Telescopes "On Problems, Tasks and Working Aids in Solar Research" "On Raising Water for the Purposes of Irrigation in the Colonies"
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