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

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396264PHYSICES ELEMENTA ſiblis eſt, non tantum indicat regularis ſeries ex reliquis ex-
perimentis deducenda, ſed &
hoc confirmat Experimen-
tum ſequens.
Experimenta hìc traduntur, ut ante initam ullam compu-
tationem a me fuere inſtituta.
Diviſo nunc grano in centum partes, patet in ſequenti
ſerie reſiſtentiam pro parte ſequi rationem velocitatis, pro
parte rationem quadrati velocitatis.
11908.22
Velocitates # Reſiſtentiæ \\ ex primacauſa. # Reſiſtentiæ \\ exſecunda cauſa. # Summæ \\ ambarum. # Reſiſtentiæ \\ In Exp.
1. # 1 X 20 = 20. # 1 X 26 = 26. # 46. # 75. 2. # 2 X 20 = 40, # 4 X 26 = 104. # 144. # 150. 3. # 3 X 20 = 60, # 9 X 26 = 234. # 294. # 300. 4. # 4 X 20 = 80, # 16 X 26 = 416. # 496. # 475. 5. # 5 X 20 = 100, # 25 X 26 = 650. # 750. # 775. 6. # 6 X 20 = 120, # 36 X 26 = 936. # 1056. # 1050. 7. # 7 X 20 = 140, # 49 X 26 = 1274. # 1414. #
Quando corpora ſimilia, ſimiliter, & velocitatibus æqua-
33909. libus, per idem fluidum, moventur, deducitur ex ante de-
44893. 899. monſtratis , reſiſtentiam utramque augeri &
minui, ut au- getur & minuitur numerus particularum fluidi ex loco mota-
rum eodem tempore, id eſt, ſequitur reſiſtentia integra ra-
5520. El. VI. tionem quadratorum laterum homologorum , &
, ſi de glo- bis, cylindris, aut conis, agatur, rationem quadratorum dia-
metrorum .
662 El. XII.
Experimentum 2.
Differt hoc cum præcedenti tantum reſpectu magnitudi-
77910. nis globi, qui in tubo T ſuſpenditur.
In hoc adhibemus
88TAB. XXXV.
fig. 1.2.
globum H, cujus diameter eſt hypotenuſa trianguli rectan-
guli iſoſceles, cujus latera ſunt ſemipoll.
, æqualia nempe
diametro globi Gin experimento I.
adhibito; quare qua-
drata diametrorum ſunt ut unum ad duo ;
in qua 9947. El. I. etiam detectæ fuere reſiſtentiæ, ut ſequenti tabella patet, in
qua + denotat exceſlum, &
- defectum exprimit.

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