Journal of the Optical Society of America/Volume 6/Issue 6
SEVENTH ANNUAL MEETING, OPTICAL SOCIETY OF AMERICA
AND
EXHIBIT OF OPTICAL INSTRUMENTS
AT
THE NATIONAL BUREAU OF STANDARDS
WASHINGTON, OCT. 26-28, 1922
Journal
of the
Optical Society of America
and
Review of Scientific Instruments
EDITOR-IN-CHIEF: PAUL D. FOOTE
Bureau or Standards, Washington, D.C.
Assistant Editor-in-Chief and Business Manager: F. K. Richtmyer
Cornell University, Ithaca, N. Y.
Consulting Business Manager, M. E. Leeds, Philadelphia, Pa.
Associate Editors:
| Term Ending Dec. 31, 1923 |
Term Ending Dec. 31, 1925 |
Term Ending Dec. 31, 1927 |
| H. D. Curtis | G. K. Burgess | W. T. Bovie |
| E. P. Hyde | K. T. Compton | H. G. Gale |
| Paul E. Klopsteg | L. R. Ingersoll | Herbert E. Ives |
| L. Silberstein | C. E. K. Mees | W. B. Lancaster |
| L. T. Troland | C. E. Mendenhall | P. G. Nutting |
| F. E. Wright | D. C. Miller | J. P. C. Southall |
AUGUST, 1922
| Report of Committee on Colorimetry for 1920-21 | 527 | |
| L. T. Troland, Chairman | ||
| Heteromorphies Due to Variation of Effective Aperture and Visual Acuity | 597 | |
| K. Horovitz | ||
| The Absorption of the Eye for Ultra-Violet Radiation | 605 | |
| Winifred P. Graham | ||
| INSTRUMENT SECTION | ||
| A New Principle and Its Application to the Lummer-Brodhun Photometer | 615 | |
| E. P. Hype and F. E. Cady | ||
| An Electromagnetic Method of Detecting Minute Irregularities in Curvature of Metallic Spheres and Cylinders and of Controlling the Oscillations of a Mass of Metal Suspended by Means of a Torsion Fibre | 620 | |
| Alexander Marcus | ||
| An Improved Form of Nichols Radiometer | 625 | |
| B. J. Spence | ||
| A Portable Seismometer | 629 | |
| P. G. Nutting | ||
| An Instrument for the Gamma Ray Measurement of the Radium Content of Weakly Active Materials | 633 | |
| N. Ernest Dorsey | ||
| The Effect of a Photo-electric Material on the Thermo-electric Current in High Vacuum Audion Bulbs | 639 | |
| Theodore W. Case | ||
| Direct Capacity Measurement | 641 | |
| George A. Campbell | ||
| Notices | 659 | |
Published Monthly by the
OPTICAL SOCIETY OF AMERICA
OFFICE OF PUBLICATION:
GEORGE BANTA PUBLISHING COMPANY
MENASHA, WISCONSIN
Entered as second-class matter May 31, 1921 at the postoffice at Menasha, Wis., under the act of March 3, 1879.
PHOTOMICROGRAPHIC EQUIPMENT
Bausch & Lomb have always been among the leaders in the development of photomicrographic equipment. We are today the only American makers of a complete line of this apparatus, consisting of outfits ranging from simple cameras for use with ordinary microscopes, to the large GSA-IL9 outfit shown above.
Wherever a microscope is required, a photomicrographic camera can be used to advantage for making a permanent, photographic record of the image. In industrial laboratories, for testing and inspecting, and in hospital and university laboratories, for educational and research purposes, our equipment is widely used.
The manufacture of this apparatus involves the very finest work in optics, combined with mechanical construction of great precision. Our many years of experience in making optical instruments has enabled us to meet these requirements in the fullest measure.
Write for descriptive circulars and let us know of your needs.
| NEW YORK | WASHINGTON | SAN FRANCISCO |
| CHICAGO | ROCHESTER, N. Y. | LONDON |
Makers of Microscopes and Microtomes, Projection and Photomicrographic Apparatus, Photographic Lenses, Metallographic Equipment, Optical Measuring Instruments, Telescopes, Stereo-Prism Binoculars, Ophthalmic Lenses and Instruments, Military Instruments, Optical Glass and Other High-Grade Optical Products
This work was published before January 1, 1929, and is in the public domain worldwide because the author died at least 100 years ago.
Public domainPublic domainfalsefalse