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Philosophical transactions, Vol. L. Part I. For the year 1757. · Various

EMERSIONES.

Manè. H. M. S. Initium penumbræ 4 52 49 Initium dubium eclipsis 4 55 29 Certo jam incæperat 4 57 30 Umbra ad Aristarchum observata vitro cæruleo plano 5 00 19 Solo tubo optico adhibito 5 00 50 Keplerus umbram ingreditur observatus tubo, et vitro cæruleo plano 5 13 20 Observatus solo tubo optico 5 14 00 Plato umbram ingreditur observatus tubo, et vitro cæruleo 5 15 2 ---- Solo tubo 5 15 40 Umbra ad Eudoxum 5 17 18 Mare serenitatis incipit mergi 5 30 10 Copernicus observatus tubo et vitro cæruleo umbram ingreditur 5 36 48 ---- Solo tubo 5 37 22 Mare Crisium ingreditur umbram 5 53 51 ---- Medium in umbra 5 59 30 ---- Totum mergitur 6 5 21 Mare fœcunditatis occultari incipit 6 7 41 Umbra ad promontorium acutum 6 8 33 Umbra tangit mare nectaris 6 22 51 Umbra ad Langrenum 6 23 33 _Observationes Eclipsium Satellitum Jovis Ulissipone habitæ a_ JOANNE CHEVALIER, _&c._ ANNO 1757 telescopio Gregoriano 7 pedum nocte serenâ, nullâque lunari luce illustratâ, observavi immersionem totalem primi satellitis die 21 Martii tempore vero postmeridiano 11ʰ 13’ 1” Die vero 22 Martii tempore vero, et antemeridiano, observavi immersionem totalem tertii satellitis 0ʰ 13’ 32” XLVIII. _Observationes Eclipsium Satellitum Jovis Ulissipone habitæ à_ Joanne Chevalier, _Presbytero Congregationis Oratorii, Regiæque_ Londinensis _Societatis Socio, Anno 1757_.

Text from Project Gutenberg, public domain in the United States.

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