Observationes Aliquae Astronomicae a Reverendo P. P. Suarez e S. J. in Paraquaria Habitae, et per D. Suarez M. D. Cum Soc. Regali Communicatae

of Sciences of Paris, at Easter 1746, I heard Mr. de Reaumur read a Memoir on this Subject. My Glass seem'd to me vastly preferable to the Vessels proposed by that great Academician. This Incident rouzed my Emulation, and gave me the better Opinion of my Glass, a Pattern of which I sent to M. Morand. The same Motive engages me to take the Advantage of the Freedom of Correspondence re-established between France and England, in sending this Description to the Royal Society. IV. Observationes aliquæ astronomicae à Reve-rendo P. P. Suarez è S. J. in Paraquaria habitæ, et per D. Suarez M. D. cum Soc. Regali communicatæ. Presented Jan. 19. ANNIO 1747, Februarii 24, post meridiem, nubilo coelo toto fere tempore eclipsis Lunæ, hæc tantum observari potuerunt in missionibus Paraquaria Soc. Jes. à P. Bonaventura Suarez, ejusdem Soc. missionario, in oppido Sancti Angeli Custodis, post emersionem secundi digiti Lunæ ex umbra Terræ, telescopio ped. 10½. | Event | Time | |------------------------|--------| | Aristarchus emergit | 14 31 47 | | Tycho emergit | 14 37 30 | | Calippus emergit | 14 56 47 | | Dionysius emergit | 15 0 4 | | Marc Cris. incipit emerge | 15 13 17 | | Finis Eclipse | 15 16 4 | Intercapedinem Intercapedinem marginum occidentalium Lunæ, et Maris Crisi vix capiebat diameter minor maculae Platonis. Oppidum Sancti Angeli in missionibus Paraquariae Soc. Jesu est reliquis orientalius. Ejus longitudo ab insula Ferri est gr. 323. m. 30. et latitudo gr. 28. m. 17 Aust. Eclipsis Lunæ ab eodem observata in oppido Sanctae Mariae Majoris, eodem anno 1747. Augusti 19. horis p. m. Penumbra sensibilis erat hor. 14. 44'. Immersio Lunæ et macularum in umbram. | Event | Time | |--------------------------------|--------| | Initium | 14 55 44 | | Aristarchus | 15 0 12 | | Galilæus | 15 0 41 | | Mare humor. incip. | 15 4 14 | | Ang. infer. terræ pruinæ | 15 5 29 | | Copernicus, &c. | 15 9 26 | | Mare humor. totum | 15 9 26 | | Plato, et Tycho æquidistabant a cent. umbrae | 15 13 44 | | Idem | 15 17 2 | | Plato et Tycho simul in margine umbrae | 15 20 25 | | Digiti 6 obscurati | 15 24 6 | | Menelaus | 15 27 28 | | Dionysius | 15 29 35 | | Lacus Somniorum | 15 36 10 | | Maris Crisi Initium | 15 43 41 | | Medium | 15 46 26 | Finis Finis . . . : 15 49 16 Totalis obscuratio Lunæ . . . : 15 53 16 Emergso Lunaæ ex umbra. Initium emersionis . . . : 17 34 48 Grimaldus . . . : 17 36 52 Aristarchus . . . : 17 40 0 Plato . . . : 17 53 34 Tycho . . . : 18 0 23 Digitii 6 obscuriati . . . : 18 3 30 Luna prope occasum vaporibus horizontis tremula non amplius fuit observata. Toto tempore eclipsis Lunæ fuit coelum valde serenum. Longitudo S. Mariae Maj. ab insula Ferri gr. 322, m. 40. Latitudo gr. 27, m. 51. Austr. V. Observatio Eclipse solaris Julii 14, et Lunæ Julii 28, 1748. Madriti habitæ à Domino Antonio de Ulloa S.S.: R: Prefl. Jan. 26. Cum ad faciendam hujus eclipse observationem paratum quidem esset telecopium reflexionis duos circiter pedes oblongum; cumque satis notus haberetur motus penduli cujusdam astronomici, quo in mea ad Peruviæ regna migratione ad plurimas ibidem una cum D. Georgio Joanne peractas observationes usus fueram, animadverti