The microscope; an introduction to microscopic methods and to histology . Fig. 36. Triple nose-piece or revol-ver for quickly changing objectives. (TheSpencer Lens Co.) Fig. 36a. Triple nose-piece or re-volver for quickly changing objectives.(The Bausch & Lomb Optical Co.) 28 MICROSCOPE AND ACCESSORIES [CH. I § 50. Field or Field of View of a Microscope.—This is thearea visible through a microscope when it is in focus. When properlylighted and there is no object under the microscope, the field appearsas a circle of light. When examining an object it appears within thelight circle, and by movin
The microscope; an introduction to microscopic methods and to histology . Fig. 36. Triple nose-piece or revol-ver for quickly changing objectives. (TheSpencer Lens Co.) Fig. 36a. Triple nose-piece or re-volver for quickly changing objectives.(The Bausch & Lomb Optical Co.) 28 MICROSCOPE AND ACCESSORIES [CH. I § 50. Field or Field of View of a Microscope.—This is thearea visible through a microscope when it is in focus. When properlylighted and there is no object under the microscope, the field appearsas a circle of light. When examining an object it appears within thelight circle, and by moving the object, if it is of sufficient size, differ-ent parts are brought successively into the field of view. In general, the greater the magnification of the entire microscope,whether the magnification is produced mainly by the objective, theocular, or by increasing the tube length, or by a combination of allthree (see Ch. IV, under magnification), the smaller is the field. The size of the field is also dependent, in part, without regard tomagnification, upon th
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