An attempt toward obtaining invariable measures of length, capacity, and weight, from the mensuration of time / [John Whitehurst].

  • John Whitehurst
Date:
1792?]
Catalogue details

Licence: Public Domain Mark

Credit: An attempt toward obtaining invariable measures of length, capacity, and weight, from the mensuration of time / [John Whitehurst]. Source: Wellcome Collection.

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    t 3 5 ] SECTION V. Of fundry Experiments tending to afcertain the EffeBs produced on the Vibration of the Pendu- lum by the maintaining Power. PROVISION having been made in the conftruc- tion of the apparatus, with a view of afcertaining the influence of the maintaining power on the vibrations of the pendulum, the following experiments have been repeatedly made with iimilar refults : I. It may be neceflary to obferve that the apparatus is purpofely conftrufted to detach the maintaining power from the pendulum without interfering in any degree with the vibrations. II. When the pendulum has been perfedly adjufted to perform 42 vibrations per minute, and has been going at that rate for the fpace of feveral days 01* weeks, 1