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Letters on Natural Magic; Addressed to Sir Walter Scott, Bart.
Language: en706 downloads on Project Gutenberg
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In: History - Other·Science - Physics
Public-domain ebook sourced from Project Gutenberg #51645.
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Illusions depending on the ear--Practised by the ancients--Speaking and singing heads of the ancients--Exhibition of the Invisible Girl described and explained--Illusions arising from the difficulty of determining the direction of sounds--Singular example of this illusion--Nature of ventriloquism--Exhibitions of some of the most celebrated ventriloquists--M. St. Gille--Louis Brabant--M. Alexandre--Capt. Lyon’s account of Esquimaux ventriloquists 157 LETTER VIII.
Musical and harmonic sounds explained--Power of breaking glasses with the voice--Musical sounds from the vibration of a column of air--and of solid bodies--Kaleidophone--Singular acoustic figures produced on sand laid on vibrating plates of glass--and on stretched membranes--Vibration of flat rulers and cylinders of glass--Production of silence from two sounds--Production of darkness from two lights--Explanation of these singular effects--Acoustic automaton--Droz’s bleating sheep--Maillardet’s singing-bird--Vaucanson’s flute-player--His pipe and tabor-player--Baron Kempelen’s talking-engine--Kratzenstein’s speaking-machine--Mr. Willis’s researches 179
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