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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    [ * ] tude of the ball will only produce an infenfible error in the length of the ftandard meafure, yet it never- thelefs becomes delirable to proceed by iimilar means to obtain fimilar refults; therefore it is an objedl of fome importance to apply the above radius, viz. *v of the longer pendulum, and of the fhorter, as the only means of perpetuating the ex i fiance of the fame meafure to the end of time. It has been objected by fome that the quantity of cohefion contained in fo fmall a quantity of matter as that of three grains in a wire — So inches, is not ca- pable of fuftaining the weight of the ball without firetching, but if an equal menfuration of time, for the fpace of feveral months or years, is any proof to the contrary, fuch teflimony is not wanting. Having premifed the general plan of the apparatus, it now remains to give a particular defeription of its conftrutftion. SEC-