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"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"
On repulsion resulting from radiation. Preliminary note on the Otheoscope
"On resistances with current and potential terminals"
On Rotatory Stability; and its Applications to Astronomical Observations on board Ships
"On Science and Social Change"
On Shooting Stars
On Some Applications of the Method of Mechanical Quadratures
On Some Aspects of the Scientific Method
"On some Hybrid Bovine Animals bred in the Society's Garden"
"On some New Phenomena of Chemical Changes produced by Electricity, particularly the Decomposition of the Fixed Alkalies and the exhibition of the new Substances which Constitute their bases; and on the general nature of Alkaline bodies"
On Some of the Methods at present in Use in Pure Geometry : 2 entries
"On Some points in the Meteorology of Bombay"
"On some pre-publication copies of Lavoisier's "Traite" (1789)"
"On some properties in achromatic object-glasses applicable to the improvement of the microscope"
On Some Recent Improvements made in the Mountings of the Telescopes at Birr Castle.
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