Available under Creative Commons-ShareAlike 4.0 International License.
A similar account must be given of the composition and resolution of any direct forces into any oblique ones by means of the diagonal and sides of the parallelogram. They serve the purpose of mechanical science and reckoning; but to be of service to reckoning and mathematical demonstrations is one thing, to set for the nature of things is another.
- 瀏覽次數：988
