Medical microscopy : a guide to the use of the microscope in medical practice / Frank J. Wethered.

  • Wethered, Frank Joesph, 1860-1928.
Date:
1898, ©1892
Catalogue details

Licence: Public Domain Mark

Credit: Medical microscopy : a guide to the use of the microscope in medical practice / Frank J. Wethered. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    MEDICAL MICROSCOPY CHAPTER I. THE MICROSCOPE AND ACCESSORIES. The first question that naturally arises when preparing to study the use of the microscope in medicine is as to the choice of an instrument. The number of different forms of microscopes now in the market is legion, and it is an exceedingly difficult matter to make a selection of any particular one. In order to do so, an intimate knowl- edge of its structure and mode of working is necessary, and it is very advisable that an inexperienced person, instead of choosing for himself, should seek the advice of a more expert friend to help him in his search, for nothing is more annoying, after expending a large sum on a large, showy stand, than to find that for practical scientific work it is almost useless. Before stating in detail the requisites of a good micro- scope, it will be well to give a short description of the instrument as sold by all modern makers. Microscopes are distinguished as simple or com- pound. In the former, the rays which enter the eye of the observer come from an object brought near to it after refraction through either a simple lens, or a combi- nation of lenses acting as a simple lens, its action as a magnifier depending on its enabling the eye to form a