2010, ISBN: 0217430287, Lieferbar binnen 4-6 Wochen

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 696 Seiten, L=152mm, B=229mm, H=39mm, Gew.=1002gr, Kartoniert/Broschiert, Klappentext: Purchase of… More...

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 696 Seiten, L=152mm, B=229mm, H=39mm, Gew.=1002gr, Kartoniert/Broschiert, Klappentext: Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER II. ILLUMINATION AND EXAMINATION. ILLUMINATION. In order to study successfully the upper air-passages, not only a knowledge of the anatomy of the locality is necessary, but also a clear and distinct view of the parts themselves must be obtained. For this purpose illumination, either direct or indirect, by means of reflecting surfaces is essential. Light.?A white light is preferable. The original simple method of Garcia and Turck is no doubt the best, but it is not practicable, since the sun's rays cannot always be obtained; hence, recourse must be had to artificial light, such as the student's coal- oil lamp, the gas-flame, oxygen-hydrogen light, or the incandescent electric light. The cheapest of these is the student-lamp, supplied with a Rochester or Argand burner, and a Mackenzie's bull's-eye condenser. This light can be made more intense and white by adding to the coal-oil a small %ece of camphor, as suggested by Sajous. The best light is no doubt the one known as the Welsbach light, which consists of a cone-shaped hood placed over a Bunsen burner; over this is fitted the Mackenzie condenser. This gives a perfectly white light, the only objection being the frailty of the cone, which is of some patented material, and is so delicate that the application of the slightest moisture, pressure, or even jarring destroys it. The ordinary gas-burner with the Mackenzie condenser furnishes a very good light, but it lacks the clearness and penetration of the Welsbach light. The electric light is a bright, steady light, and if used direct is admirable; but for a reflected light it is not so desirable, owing to its lack of penetration. The light supplied by one of the many batteries, while not so powerful as the others mentioned, is an admirable portable light, es...<

ISBN: 9780217430289

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have oc… More...

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. Books Medicine~~General Text-Book-of-Diseases-of-the-Nose-and-Throat~~David-Braden-Kyle General Books LLC The book may have numerous typos or missing text. It is not illustrated or indexed. However, purchasers can download a free scanned copy of the original rare book from the publisher's website. You can also preview the book there. Purchasers are also entitled to a trial membership in the publisher's book club where they can select from more than a million books for free. Original Publisher: Saunders Publication date: 1916 Subjects: Medical / Diseases; Medical / Otorhinolaryngology; Medical / Surgery / General<