Geometrical optics / by Val H. Mackinney and Harry L. Taylor.

  • Mackinney, Val H., 1791-1868.
Date:
1908
Catalogue details

Licence: In copyright

Credit: Geometrical optics / by Val H. Mackinney and Harry L. Taylor. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    .S-. d. 35. CONDENSING- LENS, diameter 2|-in., 2| or 3 inch focus ... 1 6 36. CONDENSING LENS, diameter 2i-in., in strong-nickel mount... 3 6 37. LENS MEASURE [as illmtmtecl), for testing cylindrical and spherical lenses ... ... 17 G 38. The SPHEROMETER, a cheaper form of measure for testing- spherical lenses... ... ... 14 G 39. BOXWOOD SCALE, with centering- cross, and reversed protractor for testing- axes of cylinders (jis lllmfrated) 1 G 40. Spectacle Feont Measure, for testing- heig-hts, pro- jection, and centres of s p e ctacles with analy- zing scale on reverse. [as illust-rated) s. d. 2 6 II. NOSE CONTOUR MEASURE |'M|Mi|iM|'M|iM|i|i|i|i|iM|i|iiiM|l|i.|Mi & s t7 e 5 i L I I I 1 I I I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIH MiLLlMElTRES glz^^ 05 1 2 3 «- 5 6 7 8 9 10 11 12 13 14 i5 iiliiiiliiiiliiiiliiiiliiiiliiiiliiiiliiiilniiliiiiliiilliiiiLiiliii^ CRegd.) A device by which the contour of Z,?^ any nose can be expressed in three measurements, from which a spectacle bridg-e can be made exactly to fit. (As Ulmtrated.) s. d Boxwood ... ... 3 G Celluloid I 0 ■ I ■ 1 . ■ . I ■ I ..J- Q \ 130 l-!0 ISO 160 170 180 / ' ■ I ■ I ■ I ■ I ■ I 42. CURL SIDE MEASURE CAs illustrated) 4 0