This is a scan of US National Bureau of Standards Circular 432 (August 14, 1941): Gould, R. E. Testing of Timepieces. Note: This is a different Gould than the Gould who restored John Harrison's "sea clocks."
Scanned 2004.
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Gould, R.E. Testing of Timepieces. US National Bureau of Standards Circular 432 (August 14, 1941), an official US federal government publication.
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