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# Title: Qua Continentur De Angulo Contactus & Semicirculi, Disquisitio Geometrica. De Sectionibus Conicis Tractatus. Arithmetica Infinitorum: sive de Curvilineorum quadraturâ, &c. Eclipseos Solaris Observatio (shelfmark Leibn. Marg. 84:2)
# Folio 3, page id 824573315:0421
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Pra lacis erat commoda: Sol enim ab una digressus nondum
ad alteram pervenerat. Ouanta autem illa fuerit, cx reliquis
Phalibus collatis latis collisitur. Prac nempeilla (juxta eom
quam exhibemus obserrationem) decem integris digitis pan-
lominor. Incidit autem (apud nos) hora 8. 582. circitei,
paulo ante oblerrationem noctram septimam.
Ubi denigi Pelipsis ad finem versebat, curavimustam mo-
mentum exitiis, quam punctum marginis solaris quod ulti-
mum umbram passum est latis curiose observare. Incidit
nempe (apudnos) hora 10. 14. Cante meridiem:) in limbi
Solaris sradtu 430, a puncto intimo Orientem verlus. Durarit
sicur Eclipsis per horas duas integras cum semisse, circi
TCr.
Ouem autem in lingulis phasibus sicum habuerine lucis
cornua, ex quem Solaris limbi gradum terigerine, in iplo
quem vides Trpo expressum habes; ut non siE Opus multIS
illud rerbis explicare. In omnibus autem illis quasnotavimus
Phalibus; consensus ipse latis indicio esse videtur, totam ob-
servationem latis accurate fuisse peractam, Paltem errores si
qui sine non adeo magnos cAc.
Diametrum Solis visibilem deprehendimus in hac lc
minorem esse quam in cd quae accidit duobus abhinc anIs,
(Martii 29, 1652. Ic. vet.) quod eo ctatim indicio patuie
quod idem circulus obserratorius quem tunc achibus non
nili in remotiori a Perspicillo dictancia implebatur.
Diametrum Lunx vilibilem, quamvis illam exhibeant Ja-
bulae Diametro Solari paulo majorem, invenimus potius x-
qualem esse, ab ca Caltem vix nocabiliquancitare differre.
ddhocindicio deprehentum cA. Circulos habebam aliguot
charraceos antea paratos, diverlae paulo ab invicem masnitu
dinis, circulo observatorio (qui dilcum solarem extribuit)
Partim majores partim minores aut aquales; quos ligillatim
ambrae in Solari diseo vilae applicando illum invemi arcui lu-
Cc