![Device takes time signal from pendulum of clock [...]ingenius apparatus takes a time signal from the pendulum. A clock without mechanical contact and the time thus [...] accurate to a small fraction of a second variation [...] day. This device was invented by R.E. Gould, Chief of Time Section of the](https://thumbs.arkivism.com/loc-2016888096.jpg)
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Device takes time signal from pendulum of clock [...]ingenius apparatus takes a time signal from the pendulum. A clock without mechanical contact and the time thus [...] accurate to a small fraction of a second variation [...] day. This device was invented by R.E. Gould, Chief of Time Section of the
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineDevice takes time signal from pendulum of clock [...]ingenius apparatus takes a time signal from the pendulum. A clock without mechanical contact and the time thus [...] accurate to a small fraction o. 1926. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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