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"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.
"On Some Recent Improvements made in the Mountings of the Telescopes at Birr Castle"
"On Some Results of the Magnetic Survey of Scotland in the Years 1857 and 1858, undertaken, at the request of the British Association, by the late John Welsh, Esq., F.R.S."
On Spectrum Analysis as Applied to Microscopical Observation: The subject of a lecture delivered at the South London Microscopical and Natural History Club, April 9, 1872 : 2 entries
On Spectrum Analysis as applied to Microscopical Observation : 2 entries
On Superstitions connected with the History and Practice of Medicine and Surgery
"On Surface Energy and Surface Entropy"
On Surgery and Instruments
"On the "Hyperbola" Method for the Measurement of Surface Tensions"
"On the 100th Anniversary of the Birthday of Friedrich Paschen and Pieter Zeeman"
"On the Abbe Theory (1873)"
"On the Action of Electricity on Gases. II On the Electric Decomposition of Carbonic-acid Gas"
"On the action of Light upon Plants, and of Plants upon the Atmosphere"
"On the Adaptation of the Structure of the Sloths to their peculiar Mode of Life"
On the Adaption of External Nature to the Physical Condition of Man: principally with reference to the supply of his wants and the exercise of his intellectual faculties
On the Adaption of External Nature to the Physical Condition of Man Principally with Reference to the Supply of His Wants and the Exercise of His Intellectual Faculties
"On the Adjustment of the Transit Circle and Equatorial"
"On the Advantage of a Collection of Numbers, to be entitled the Constants of Nature and Art"
"On the Advantages to be attained by a Revision and Re-arrangement of the Constellations, with especial Reference to those of the Southern Hemisphere, and on the Principles on which such Re-arrangement ought to be Conducted"
"On the Advantages to be derived from the Use of Metallic Reflectors for Sextants and other Reflecting Instruments; and on Methods of directly determining the Errors in Mirrors and Sun-Shades used in Reflecting Instruments"
On the Advisability of Training the Youth of Britain to Military Exercises, as productive of National Safety
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