Art of Engraving: A Practical Treatise on the Engraver's Art, with Special Reference to Letter and Monogram Engraving

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The Keystone, 1903 - Engraving - 199 pages
 

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Page 205 - THE OPTICIAN'S MANUAL VOL. II. BY CH BROWN, MD Graduate University of Pennsylvania ; Professor of Optics and Refraction ; formerly Physician in Philadelphia Hospital ; Member of Philadelphia County, Pennsylvania State and American Medical Societies. The Optician's Manual, Vol. II., is a direct continuation of The Optician's Manual, Vol. I. , being a much more advanced and comprehensive treatise. It covers in minutest detail the four great subdivisions of practical eye refraction, viz : Myopia. Hypermetropia....
Page 204 - THE OPTICIAN'S MANUAL VOL. I. BY CH BROWN, MD Graduate University of Pennsylvania ; Professor of Optics and Refraction ; formerly Physician in Philadelphia Hospital ; Member of Philadelphia County, Pennsylvania State and American Medical Societies. The Optician's Manual, Vol. I., has proved to be the most popular work on practical refraction ever published. The knowledge it contains has been more effective in building up the optical profession than any other educational factor. A study of it is essential...
Page 21 - Draw the diameters AC, BD, at right angles to each other; and join AB, BC, CD, and DA, then ABCD is the square required.
Page 205 - The Optician's Manual, Vol. II., is a direct continuation of The Optician's Manual, Vol. I. , being a much more advanced and comprehensive treatise. It covers in minutest detail the four great subdivisions of practical eye refraction, viz : Myopia. Hypermetropia. Astigmatism. Muscular Anomalies. It contains the most authoritative and complete researches up to date on these subjects, treated by the master...

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