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Issues
December 1942
ISSN 0002-9505
EISSN 1943-2909
In this Issue
PAPERS
ANNOUNCEMENTS AND NEWS
NOTES AND DISCUSSIONS
A simple model of a gravitational lens from geometric optics
Bogdan Szafraniec, James F. Harford
Playing with active matter
Angelo Barona Balda, Aykut Argun, et al.
The physics of “everesting” on a bicycle
Martin Bier
The hardest-hit home run?
Donald C. Warren