Manual of the Principles And Practice of Operative Surgery
The book Manual of the Principles And Practice of Operative Surgery was written by author Smith, Stephen, 1823-1922 Here you can read free online of Manual of the Principles And Practice of Operative Surgery book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Manual of the Principles And Practice of Operative Surgery a good or bad book?
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polished silver, perforated in the cen- tre, is placed at an angle of 45°, to reflect the Fig. 531.2 I F. N. Otis. 2 G. Tiemann & Co. THE URETHUA. 529 Fig. 532.1 light, wliich is placed laterally, into tlie tube, so as to illuminate it to the end; as the calibre i>f the tube fs very small, a most brilliant light is required, and, in order to ol)tain the best effects, it should be made to converge slightly upon the mirror, l)y interposing between the light and mirror a plano-convex lens of suita...ble focal length. The light being sulhcient, the lens properly ad- justed, the mirror bright and correctly placed with respect to the tube, the eye of the observer, looking through the perforation in the mirror, can see clearly to the bottom of the speculum. The meatoscope (Fig. 532) is for ex- amination of the parts within an inch or more of the meatus. 3. The circumference of the flaccid penis generally bears a certain relation to tlu' eapacity of tin- urethral eanal; by taking the measurement of the former the calibre of the latter ean be very closely appro.ximated before instruments are introduced.'^ The following relations have been noted: 2 penis 3 inches, canal 30, of the French scale; penis 3i, canal 32; penis 3j, canal 34; penis, 3?, canal 36; penis 4, canal 38 ; penis 4'i to 41, canal 40 or more.
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