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"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
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