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September 1950

Volume 3, Issue 9

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The challenge of the ruled grating

George R. Harrison
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Sometimes an old and tried method is so steadily fruitful and so promising in what it might reveal if improved that it has served as a continuous challenge to successive generations of physicists. This is so with the diffraction grating used for spectroscopy. But it is often easier to meet the demands of increasing accuracy by changing one's approach than it is to pursue the original method of attack. The history of ruling gratings is outlined here, as are some of the new attacks on the problem.

The insides of metals

Carl A. Zapffe
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The microscopic examination of fractured metal by a special “fractographic” technique is proving useful in revealing something of the manner in which metal coheres and in throwing some light on the nature of the minute subdivisions of metallic crystals.

Young professional physicists

Bernard C. Murdoch and Marsh W. White
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The Mathematical Theory of Communication

Claude E. Shannon, Warren Weaver, and Norbert Wiener, Reviewer
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Introduction to the Luminescence of Solids

Humboldt W. Leverenz and Frank Urbach, Reviewer
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Fundamentals of Radio‐Valve Technique

J. Deketh and J. R. Whitehead, Reviewer
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Author's Guide for Preparing Manuscript and Handling Proof

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Books Received

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Norman R. Beers

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F. T. Peirce

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Calendar of Events

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Physicists and Military Mobilization

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Draft deferment of physics students; Deferment of physicist members of military reserves

On Teaching Physics

R. F. Paton and R. M. Sutton
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AAPT meeting reported; Piezoelectricity; The demonstration lecture as an art

The Smaller the Better

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Pocket‐size sound‐level meter

Fellowships

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Next year’s Fulbright opportunities; Kimberly‐Clark Corporation fellowships

Editors of Physical Review

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Group photo wanted

Tate Fellowship Fund

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Contributions welcomed

What Do You Do?

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Information on labs needed

Established

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Argentina's AEC; APS; New course at NYU; New curriculum at Lehigh.

Meeting to be Held

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X‐ray spectroscopy and the solid state

Erratum

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Concave not convex
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Provisions for Student Sections

Henry A. Barton
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New Plan For STUDENT ORGANIZATION
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Physics in the USSR

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Quantum Electrodynamics

L. Rosenfeld
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Tester for Photographic Lenses

F. G. Back
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Soap on Rye

A. J. Stosick
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Upper Air Temperatures from Spectra

Lewis M. Branscomb
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Liquid‐Solid

C. A. Swenson
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Whereabouts

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