Description of an apparatus called the rotascope, for exhibiting several phenomena and illustrating certain laws of rotary motion
By: by Walter R. Johnson.
Contributors: YA Pamphlet Collection (Library of Congress); Pamphlet Collection (Library of Congress)
Publisher: s.n.
Published: 183u
Place of publication: [Philadelphia?
Language: eng
Number of pages: 18
Subjects: Earth -- Rotation.; Rotational motion.