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"On a Ceraunia of Jade Converted into a Gnostic Talisman" "On a Chinese Planisphere" "On a Combination of Oxymuriatic Gas and Oxygene Gas" "On a compact apparatus for determining Young's modulus for thin wires" "On a Galilean Telescope made about 1640 by William Gascoigne, Inventor of the Filar Micrometer" "On a Greek Qualitative Planetary Model of the Epicyclic Variety" "On a Magnetic Experiment" "On a Medieval Circle Quadrature: De circulo quadrando" "On a method for deducing approximately the focal lengths and magnifying powers of early telescopes" "On a Method of Cooling the Air of Rooms in Tropical Climates" On a moveable horizontal Sun-dial, capable of indicating apparent Solar Time within a small fraction of a Minute "On a New Analyzer, and its Use in Experiments of Polarization" On a New Classification of the Lepidoptera "On a new Compound Microscope" "On a New Design of Micromanipulator" "On a New Form of Electrical Contact-Maker for Astronomical and Other Clocks" On a New Form of Equatorial Telescope "On a new form of Ergometer (Dynamometer)" "On a new Form of Polariscope and its application to the Observation of the Sky" "On a New Form of Polariscope, and its application to The Observation of the sky" On a New Kind of Rays: 100 Years of X-Rays at Cambridge On a New Method of Determining the Latitude of a Place by Observations of the Pole-Star "On a New Method of Preparing Mercuric Hyponitrite" On a New Mode of Secret Writing "On a New Species of Coloured Fringes, produced by Reflexion between the Lenses of Achromatic Object-Glasses" "On a New Species of Coloured Rings, produced by the Reflection of Light between Two Plates of Parallel Glass of Equal Thickness" "On a new Species of the Genus Apteryx" "On a Nocturnal dated 1572 exhibited by Sir Reginald Palgrave at the Society of Antiquaries, Jan. 31, 1895" On a portable sundial of gilt brass made for Cardinal Wolsey : 2 entries "On a Possible Explanation of the Adaptation of the Eye to Distinct Vision at Different Distances" "On a Recently Observed Meteor" "On a Remarkable Case of Magnetic Intensity of a Chronometer" "On a remarkable Modification of Newton's Rings" "On a Self-acting Circular Dividing Engine" "On a simple electric immersion heater for constant temperature baths" "On a simple form of harmonic analyser" "On a Spectroscope in which the Prisms are automatically adjusted to the minimum angle of deviation for the particular ray under examination" "On a Standard Decimal Measure of Length for Mechanical Engineering Work, etc." "On a Sun-Dial" "On Abnormal Teeth in Certain Mammals, especially in the Rabbit" On Aerial Locomotion On Aerial Locomotion On an altazimuth constructed from the designs of the late Rev. Dr W. Pearson "On an Anomalous Case of Vision with regard to Colours" "On an Astrolabe Planisphere of English make" On an Astronomical Instrument of the Ancient Irish On Angular Aperture of Objectives for the Microscope: Read before the Microscopical Congress at Indianapolis, Indiana, August 15th., 1878 : 2 entries "On Apparatus for Testing the Delicacy of the Muscular and other Senses in different Persons" "On Artificial Temporary Colour-Blindness, with an Examination of the Colour Sensations of 109 Persons" On attraction and repulsion resulting from radiation "On Babbage's System of Mechanical Notation as Applied to Automatic Machinery" "On Bird and Beast in Ancient Symbolism" On British Stone Circles 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
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