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.

    52/86 (page 24)
    re- [ *4 ] ideas which have hitherto occured on that fubjecl lative to the original conftrudtion of meafures, both of length, capacity, and weight: for fmce it appears, from fundry experiments, that an alteration = T,,>TO of an. inch in the pendulum whofe length is 80 inches, will produce a fenfible alteration in its menfuration of time ; may we not thence infer, that the refult of fuch experiments, with the aid of a tranfit - inftrument, mull be attended with a confiderable degree of accuracy ? for iince the meafures of capacity and weight deduced from thence, depend altogether upon whole numbers, it is reafonable to expedt that a con- fiderable analogy in the accuracy of their conftruc- tion may enfue. The molt ufeful and moft advantageous application of weights and meafures being a fubjedl univerfally known, with regard to their feveral divifions and combinations, it feems altogether needlefs to fuggeft a lingle idea on that head. I fhall therefore proceed to give fome account of fundry experiments which have been made to afcertain the effedts produced by the maintaining power on the vibrations of the pen- dulum. S EC-