Observatio Eclipsis Lunae Die 30 Julii 1757. Habita Olissipone à Joanne Chevalier, Congregationis Oratorii Presbytero, é Regia Londinensi Societate. Communicated by Jacob De Castro Sarmiento, M D F. R. S.

series given, the even powers of \( x \), or any other terms whatever, be wanting, their places must be supplied with cyphers; which, in order the of numbering off, must be reckoned as real terms. --- **CIV. Observatio Eclipseis Lunæ Die 30 Julii 1757. habita Olissipone à Joanne Chevalier, Congregationis Oratorii Presbytero, é Regia Londinensi Societate. Communicated by Jacob de Castro Sarmiento, M D F. R. S.** Tubo optico 8 pedum. | Read Nov. 16. | Initium penumbrae | 9 | 15 | 18 | |---------------|-------------------|---|----|----| | 1758. | Initium dubium eclipsis | 9 | 22 | 24 | | Certo jam incœperat | — | — | 9 | 23 | 34 | | Umbra ad mare humorum observata | — | — | 9 | 31 | 2 | | vitro plano cæruleo | — | — | 9 | 31 | 29 | | Solo tubo optico observata | — | — | 9 | 31 | 48 | | Vitro flavo observata | — | — | 9 | 31 | 20 | | Umbra tangit Grimaldum observata | — | — | 9 | 31 | 50 | | vitro plano cæruleo | — | — | 9 | 32 | 8 | | Solo tubo optico | — | — | 9 | 34 | 4 | | Vitro plano flavo | — | — | 9 | 34 | 28 | | Totus Grimaldus tegitur observatus | — | — | 9 | 34 | 47 | | vitro plano cæruleo | — | — | 9 | 34 | 47 | Vol. 50. | Description | Time | |---------------------------------------------------------------------------|------| | Umbra ad Typhonem observata vitro plano caeruleo | 9 | | Solo tubo optico | 9 | | Vitro flavo | 9 | | Umbra ad Harpalum vitro caeruleo observata | 9 | | Solo tubo optico | 9 | | Umbra ad Fracastorium | 9 | | Umbra ad Mare Nectaris | 10 | | Observata vitro flavo | 10 | | Umbra ad Dionyfium | 10 | | Umbra tangit Mare Tranquillitatis | 10 | | Umbra ad Mare Serenitatis | 10 | | Umbra tegit Menelaum observata vitro caeruleo | 10 | | Solo tubo optico | 10 | | Vitro flavo | 10 | | Totum Mare Fœcunditatis tegitur | 10 | | Umbra tangit Mare Crisium vitro caeruleo observata | 10 | | Solo tubo optico | 10 | | Vitro flavo | 10 | | Umbra ad Proclum | 10 | | Posidonius totus tegitur | 10 | | Totum Mare Serenitatis tegitur | 10 | | Totum Mare Crisium ab umbra tegitur | 10 | | Plato tegitur vitro caeruleo observatus | 10 | | Solo tubo optico | 10 | | Vitro flavo | 10 | | Obscuratio maxima | 10 | ### Emersiones. | Event | Time | |----------------------------------------------------------------------|------| | Plato emergit observatus vitro flavo | 11 | | Solo tubo optico | 19 | | Vitro caeruleo | 19 | | Aristarchus emergit | 21 | | Gassendus incepit emergere observatus vitro flavo | 25 | | Observatus solo tubo optico | 25 | | Observatus vitro caeruleo | 26 | | Gassendus totus extra umbram | 28 | | Schicardus incipit emergere | 45 | | Totus extra umbram | 47 | | Totum Mare Humorum extra umbram | 46 | | Menelaus extra umbram | 55 | | Mare Serenitatis extra umbram | 59 | | Tycho extra umbra observatus vitro flavo | 00 | | Solo tubo optico | 00 | | Vitro caeruleo | 01 | | Incipit emergere Mare Crisium | 08 | | Totum Mare Crisium extra umbram | 16 | | Finis eclipsis | 28 | Observatio hæc peracta est coelo claro; umbra autem terræ ita diluta erat, ut maculæ in ea conditæ fatis dignoscerentur.