ISSN:0031-9228    

DOI:10.1063/1.3066653

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

It has been known for many hundreds of years that a suitably suspended bar magnet will turn itself so that its axis lies roughly in a north‐south direction. This unexpected and useful property early attracted the attention of navigators and was among the first subjects to be studied after the rebirth of science in Europe in the fifteenth and sixteenth centuries. These studies culminated in the work of William Gilbert, Queen Elizabeth's physician, who wrote in 1600, “Magnus magnes ipse est globus terrestris,” the earth itself is a great magnet.

ISSN:0031-9228    

DOI:10.1063/1.3066654

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

In times past, well developed clear crystals were a rare gift of nature and were highly valued. Their luster and regularity of shape have been a source of pleasure to the layman through the centuries and a cause for speculation to the naturalist and philosopher.

ISSN:0031-9228    

DOI:10.1063/1.3066621

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

Gentlemen and Fellow Physicists of America:We meet to‐day on an occasion which marks an epoch in the history of physics in America; may the future show that it also marks an epoch in the history of the science which this society is organized to cultivate! For we meet here in the interest of a science above all sciences, which deals with the foundation of the Universe, with the constitution of matter from which everything in the Universe is made, and with the ether of space by which alone the various portions of matter forming the Universe affect each other even at such distances as we may never expect to traverse whatever the progress of our science in the future.

ISSN:0031-9228    

DOI:10.1063/1.3066622

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

Unity and smoothness are characteristics which are not easily produced in an account of a meeting of the American Physical Society, and even much less in this account of the Seattle meeting, of June 27–29, whose keynote was in fact the opposite of unity.

ISSN:0031-9228    

DOI:10.1063/1.3066623

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

There are very few people who spend much time on the optical properties of thin films and a large percentage of them attended an international conference on the optical properties of thin films held at Marseille from April 19 to 23.

ISSN:0031-9228    

DOI:10.1063/1.3066627

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

David M. Delo, formerly of the Army logistic division's research and development group, has been named the first executive director of the American Geological Institute.

ISSN:0031-9228    

DOI:10.1063/1.3066629

出版商:AIP    

年代:1949

数据来源: AIP

摘要:

Archie G. Worthing, University of Pittsburgh professor of physics, died July 30 at the age of sixty‐eight.

ISSN:0031-9228    

DOI:10.1063/1.3066637

出版商:AIP    

年代:1949

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3066639

出版商:AIP    

年代:1949

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3066642

出版商:AIP    

年代:1949

数据来源: AIP