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Document Type

Research

Abstract

Apparatus consists of a brass tube partitioned into chambers. Partitions contain small holes which are exactly aligned. Gas is introduced at a pressure of several millimeters at one end; a vacuum is maintained in other chambers by rapid pumping and the molecular beam passing through the aligned holes is measured by impact upon a vane suspended from a quartz fiber. Introduction of a gas in one of intermediate chambers deflects away a definite proportion of the beam giving a direct measure of the mean free path.

Publication Date

1930

Journal Title

Proceedings of the Iowa Academy of Science

Volume

37

Issue

1

First Page

315

Last Page

315

Copyright

© Copyright 1930 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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