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Watch and Clock Escapements
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Chapter 9 -Lenses.
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Released on: 06/12/2017
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1 Chapter 1 THE DETACHED LEVER ESCAPEMENT.2 Chapter 2 THE CYLINDER ESCAPEMENT.3 Chapter 3 THE CHRONOMETER ESCAPEMENT.4 Chapter 4 HISTORY OF ESCAPEMENTS.5 Chapter 5 -Introductory Remarks.6 Chapter 6 -The Eye Anatomically.7 Chapter 7 -The Eye Optically; or, The Physiology of Vision.8 Chapter 8 -Optics.9 Chapter 9 -Lenses.10 Chapter 10 -Numbering of Lenses.11 Chapter 11 -The Use and Value of Glasses.12 Chapter 12 -Outfit Required.13 Chapter 13 -Method of Examination.14 Chapter 14 -Presbyopia.