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Document Type

Research

Abstract

A modification of Harrison's microphotometer has been developed, following his suggestion, which is used for accurate measurements of line widths on spectrograms. A vertical optical system using microscope lenses focuses the light on a bismuth-silver thermocouple. Accurate readings of length are obtained with a finely constructed micrometer screw. Studies have also been made on the relative intensities of lines on both optical and X-ray spectrograms. The instrument is also of use in testing the uniformity of thin films of metal.

Publication Date

1927

Journal Title

Proceedings of the Iowa Academy of Science

Volume

34

Issue

1

First Page

279

Last Page

279

Copyright

© Copyright 1927 by the Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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