Measurement of time and tests of timepieces.

Bibliographic Details
Corporate Author:	United States. National Bureau of Standards
Format:	Government Document Book
Language:	English
Published:	Washington : Govt. Print. Off, 1914.
Edition:	<1st ed.> Issued December 1, 1914.
Series:	Circular of the Bureau of Standards, no. 51
Subjects:	Clocks and watches. Time > Systems and standards.

Description
Item Description:	S. W. Stratton, director. At head of title: Department of Commerce ...
Physical Description:	39 pages, 1 plate : illustrations ; 28 cm.