Newton, Isaac - Philosophia naturalis principia mathematica

1inventa inſuper longitudine MP; in tBcapiatur punctum b,

ea lege, ut ſi TA, τCſe mutuo ſecuerint in Y,ſit diſtantia Yb
ad diſtantiam YB,in ratione compoſita ex ratione MPad MN
& ratione ſubduplicata SBad Sb.Et eadem methodo inveNI
endum erit punctum tertium β, ſi modo operationem tertio repe
tere lubet. Sed hac methodo operationes duæ ut plurimum ſuf
fecerint. Nam ſi diſtantia Bbperexigua obvenerit; poſtquam
inventa ſunt puncta F, f& G, g,actæ rectæ Ff& Ggſecabunt
TA& τCin punctis quæſitis X& Z.

LIBER
TERTIUS.

Exemplum.

Proponatur Cometa anni 1680. Hujus motum a Flamſtedio
obſervatum Tabula ſequens exhibet.

Tem.appar.Temp. verumLong. SolisLong. CometæLat. Cometæh.′h.′″gr.′″gr.′″gr.′″1680 Dec.124.464.46.0 1.51.23 6.31.218.26.0216.32 1/26.36.5911.6.44 5.7.3821.45.30246.126.17.5214.9.2618.49.1025.23.24265.145.20.4416.9.2228.24.627.0.57297.558.3.219.19.43 13.11.4528.10.5308.28.10.2620.21.917.39.528.11.121681 Jan.55.516.1.3826.22.18 8.49.1026.15.2696.497.0.53 0.29.218.43.1824.12.42105.546.6.101.27.4320.40.5723.44.0136.567.8.554.33.2025.59.3422.17.36257.447.58.4216.45.36 9.35.4817.56.54308.78.21.5321.40.5813.19.3616.40.57Feb.26.206.34.5124.46.5915.13.4816.2.256.507.4.4127.49.5116.59.5215.27.23

His adde Obſervationes quaſdam e noſtris.

Temp. appar.Cometæ Longit.Com. Lat.Febr.258h.30′ 26gr..18′.17″12gr..46′ 7/8278.1527.4.2412.36 1/5Mart.111.027.53.612.24 6/728.028.12.2712.20511.3029.20.5112.3 1/298.30 0.43.411.45 7/8

Hæ Obſervationes Teleſcopio ſeptupedali, & Micrometro filiſ
Q.E.I. ſoco Teleſcopii locatis peractæ ſunt: quibus inſtrumentis

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