Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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404269MATHEMATICA. LIB. II. CAP. XI. rat juxta directionem axeos cylindri.
11
Velocitates # Reſiſtentiæ
1. # gr. {3/4}.
2. # gr. 2.
3. # gr. 4.
4. # gr. 7 {1/2}.
5. # gr. 11.
6. # gr. 14.
7. # gr. 20 {1/2}.
Diviſo grano in centum partes ſeparantur reſiſtentiæ ex
duabus cauſis.
22923.33
Velocitates # Reſiſtentiæ # Reſiſtentiæ # Summæ # Reſiſtentiæ
ex 12 cauſa # ex 22. cauſa # ambarum # in exper.
1. # 1 x 20 = 20. # 1 x 39 = 39. # 59. # 75. 2. # 2 x 20 = 40. # 4 x 39 = 156. # 196. # 200. 3. # 3 x 20 = 60. # 9 x 39 = 351. # 411. # 400. 4. # 4 x 20 = 80. # 16 x 39 = 624. # 704. # 750. 5. # 5 x 20 = 100. # 25 x 39 = 975. # 1075. # 1100. 6. # 6 x 20 = 120. # 36 x 39 = 1404. # 1524. # 1400. 7. # 7 x 20 = 140. # 49 x 39 = 1911. # 2051. #
Unde patet reſiſtentiam ex prima cauſa in hoc caſu illam
eſſe, quæ obſervata fuit, in experimentis cum globo &
co-
no inſtitutis ejuſdem diametri cum hoc cylindro, juxta
demonſtrata in n.
912. Patet etiam reſiſtentiam ex ſe-
cunda cauſa in hoc experimento ſe habere ad reſiſtentiam
globi ut 39 ad 26.
, id eſt ut 3. ad 2, ut monui in n. 44923. 908.915.
Reſiſtentia ex prima cauſa in variis fluidis differt, hanc-
55924. que differentiam niſi experimentis determinari non poſſe
facile etiam patet.
In motibus velocioribus, ſi fluida glutinoſa excipiamus
66925. exigua eſt reſiſtentia ex cobæſione partium, collata cum re,
ſiſtentia ex ſecunda cauſa;
quod ex diverſis rationibus, ſe-
cundum quas augentur, ſequitur.
Centies ex gr. auctâ

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