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His real business life commenced after he became Astronomer Royal. The 46 years that he remained in office, he was so entirely wrapped up in the duties of his post that the history of the Observatory is the history of his life.Download Description
In Jan. 1824, at Playford, I was working on the effects of separating the two lenses of an object-glass, and on the kind of eye-piece which would be necessary: also on spherical aberrations and Saturn's figure. On my quires at Cambridge I was working on the effects of separating the object-glass lenses, with the view of correcting the secondary spectrum: and on Jan. 31st I received some numbers (indices of refraction) from Mr Herschel, and reference to Fraunhofer's numbers. ... Read more

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This Elibron Classics book is a facsimile reprint of a 1870 edition by Macmillan and Co., London. ... Read more

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This Elibron Classics book is a facsimile reprint of a 1871 edition by Macmillan and Co., London. ... Read more

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1871. Designed for the Use of Students of the University. Contents: General Recognition of the Air as the Medium which Conveys Sound; Properties of Air, on which the Formation and Transmission of Sound Depend; Theory of Undulations, as Applied to Sound; and Investigation of the Passage of a Wave of Air Through a Cylindrical Pipe or of a Plane Wave Through the Atmosphere Generally; Investigation of the Motion of a Wave of Air through the Atmosphere Considered as of Two or Three Dimensions; Transmission of Waves of Soniferous Vibrations through Different Gases, Solids and Fluids; Experiments on the Velocity of Sound and on the Pressure Accompanying Atmospheric Waves; and Comparison of the Experimental Results with the Results of Theory; On Musical Sounds and the Manner of Producing Them; On the Elements of Musical Harmony and Melody and of Simple Musical Composition; On Instrumental Music and the Adaptations of Music Required by Special Instruments; and On the Human Organs of Speech and Hearing. ... Read more

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This volume is produced from digital images created through the University of Michigan University Library's preservation reformatting program. ... Read more