An essay on the powers and mechanism of nature; : intended, by a deeper analysis of physical principles, to extend, improve, and more firmly establish, the grand superstructure of the Newtonian system. / By Robert Young.

  • Young, Robert
Date:
M DCC LXXXVIII. [1788]
Catalogue details

Licence: Public Domain Mark

Credit: An essay on the powers and mechanism of nature; : intended, by a deeper analysis of physical principles, to extend, improve, and more firmly establish, the grand superstructure of the Newtonian system. / By Robert Young. Source: Wellcome Collection.

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    [130 ] trary to the agent, itfelf becomes alfo an agent, if moving in the fame direflion with lefs velo- city, the impulfe is the fame as if the patient were at reft, and the agent were only moving with its excefs or difference of velocity. z Therefore the patient as fuch, is to be con- fidered as always at reft, and as inaQ;ive ; con- fequently, as having no tendency to motion. A An inactive body being in a part to WHICH an active BODY TENDS TO MOVE WILL BE AN OBSTACLE TO THE MOTION OF THE ACTIVE BODY. • For in order that the aflive body fhould move, either the inaflive one muft alfo move, fo as 1 not to impede it, or the aflive body muft pafs through the ina6live one ; but the inadive body cannot move, becaufe it is inaflive; and the aflive body cannot pafs through it, becaufe f of the cohefion of the parts of the inaflive mafs ; therefore, until one of thofe impediments are removed, it is impoflible the aflive body fliould move. B The active substance united w^ith an ACTIVE BODY OPPOSED BY AN OBSTACLE WILL FLOW OUT OF THE ACTIVE BODY INTO THE OBSTACLE,, The