论文信息 - A utilization of the Kohler system of illumination.

A utilization of the Kohler system of illumination.

The following system of microscope lighting is based on ideas gleaned from a number of sources, particularly Belling (1930) and Shillaber (1944). The principles are not new and this article is primarily concerned with an implementation of the well known Kohler method. The chief points to be emphasized are the use of a prism and a Polaroid variable density screen.

D E COPELAND | D. Copeland

[1] H. Leffmann. The use of the microscope: By John Belling, Carnegie Institution of Washington. 315 pages, illustrations, 8vo. New York, McGraw-Hill Book Company, 1930. Price, $4.00 , 1930 .