The perfected prismometer : its practical advantages, construction, and various applications / by C.F. Prentice.
- Prentice, Charles F. (Charles Frederick), 1854-
- Date:
- [1891]
Licence: Public Domain Mark
Credit: The perfected prismometer : its practical advantages, construction, and various applications / by C.F. Prentice. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![Preface. To judge from a recently expressed opinion, and which is in such remarkable contrast to Dr. Swan M. Burnett's able and irrefutable argument in favor of the prism-dioptry as to prompt a repetition here: [ The numbering of prisms according to their meter-angles or dioptry-angles, lately advocated by so many writers, seems to me a cumbrous, inconvenient, and inaccurate system ; and I have yet to see a valid argument in favor of its adoption],1 it would appear that sound reasoning alone has been insufficient to gain universal approval for Mr. Prentice's metric system, so that skillful opticians should secure an opportunity to demon- strate its value through the prismometer for themselves. The merits of the metric system are fully explained by the author in the appended paper, and, as we find it far superior to other recently ventilated theories in effectively meeting the requirements of practical opticians, we cheerfully lend it our support2 as manufacturers of optical lenses and prisms. BAUSCH & Lomb Optical Co. Rochester, N. Y., Feb., 1891. 1 On the Cylindrical Equivalent of Tilted Lenses, etc., etc. Dr. W. A. Holden, Archives of Ophthalmology, vol. xx., No. 1, Jan'y, 1891. 2 Our letter to Dr. Swan M. Burnett, published in the Ophthalmic Reviezv, London, Jan'y, 1891.](https://iiif.wellcomecollection.org/image/b22275356_0006.jp2/full/800%2C/0/default.jpg)
