Horological Journal [1950] - The official Organ of the British Horological Institute, :: Number of documents found: 1
(8135) Unusual Precision Pendulum
- Author: Young, R. E. :: Year Vol (No) Month (or Chapter/Auction item): 1950 mar :: Pages: 159-60
- Comments and/or Abstract > impulsed
above the center of support by a electrically dropped gravity arm