Letter | Published:

Spectroscopy of Cells: the Use of a Reflecting Microscope and Spectrographic Recording

Naturevolume 166pages2627 (1950) | Download Citation



THIS communication describes the use of a simple microspectroscopic method which permits the recording of the ultra-violet and the visible absorption characteristics of cells or portions of cells within a period of a few seconds. The apparatus consists of a light source which emits radiation throughout the ultra-violet and the visible spectrum, a microscope with a reflecting achromatic condenser and objective of numerical aperture 0.56 (designed by Mr. A. J. Kavanagh and made by the Scientific Instrument Division of the American Optical Company), and a small quartz spectrograph (Hilger).

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  1. Sloan-Kettering Institute for Cancer Research, New York, N.Y.

    • , JOHN F. KEANE JUN.


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