Clarissimo Viro Domino Nehemiae Greuio Regiae Societatis a Secretis Jo. Dominicus Cassinius S. P. D.

PHILOSOPHICAL TRANSACTIONS. For the Months of September, October, and November, 1678. The Contents. Monsieur Cassini's Observation of the Lunar Eclipse on the 29 Octob. 1678. Monsieur Gallet's Observation of the Solar Eclipse on the 11 June, 1676. Extract of a Letter from Monsieur Butterfield about the making of Microscopes, &c. Extract of a Letter from Mr. Conyers about his Improvement of Sir Samuel Moreland's Speaking Trumpet. An Account of two Books: I. A Discourse of the State of Health in Jamaica, &c., by Dr. Thomas Trapham. II. Catalogus Stellarum Australium: by Mr. Edmund Halley. Clarissimo Viro Domino Nehemiae Greuio Regiae Societatis à Secretis Jo. Dominicus Cassinius S. P. D. Cum nupera Luna Eclipse à nobis hic in observatorio regio diligentissime fuerit observata, ejus exemplar ad te, Vir Clarissime, mittendum duxi regiae Societatis Astronomiae, imprimisque D. Flamstedio, communicandum. Inserviet illa Meridianorum differentia Parisios inter & Londinum exactè definienda, si vobis par cæli serenitas ejusdem observandæ opportunitatem obtulerit, &c. Observatio Lunaris Eclipse die 29 Octobris 1678. | Phases lune & macularum secundum denominationem Riccioli | In observatorio Regio | In Collegio Claromontano | |----------------------------------------------------------|-----------------------|-------------------------| | | Infra | Supra | | | h " | h " | | Incipit Umbra | 6 43 30 | 6 43 40 | 6 43 54 | | Grimaldi lympus sequens | 45 0 | | 45 29 | | Gallileus | 46 0 | 46 0 | | | Finis Gallilei | 47 0 | | | | Mersenius | 48 20 | | | | Chorda Eclipse dig. 6. | | 49 0 | | | Gassendi initium | 50 50 | 50 50 | | | Gassendi medium | | 51 30 | 51 37 | | Schikardi initium | 51 43 | | | | II. digiti Ecliptici | | 52 0 | | | Aristarchi initium | 52 50 | | | | Aristarchi medium | | 53 10 | 53 7 | | Morinus | | | | | Aristarchi & Morini finis | 54 0 | | | | Capuanus sive oculus draconis | 56 0 | | | | Digitii III. | | 56 30 | | | Chorda 9 digitorum | | 57 | | | Initium terrae pruinæ & Copernici | | | | | Copernici initium | | 58 54 | | | Copernici medium | | | 59 10 | | Copernici finis | | | 59 30 | | Pitheæ initium | | | | | Pitheæ finis | | | | | Caput Virginis | | | | | Harpalus | | | | | Tychonis initium | | | | | Tychonis medium | | | | | Tychonis finis | | | | | Eratostenes | | | | | Digiti V. | | | | Pro- | Promontorium inter Virginem & Platonem | h | " | h | " | h | " | |----------------------------------------|---|---|---|---|---|---| | Insula in ultimo sinuum mediorum | 7 | 7 | 0 | | Clara sequens Tychonem | 7 | 3 | 0 | | Digiti VI. | 8 | 3 | 1 | | Tymocharis | 11 | 2 | 0 | | Platonis initium | 13 | 2 | 0 | | Platonis medium | 13 | 4 | 0 | | Platonis finis & initium | 14 | 0 | | Manilii | 14 | 4 | 0 | | Finis Manilii | 15 | 1 | 2 | | Dionysii initium | 17 | 1 | 5 | | Dionysius | 17 | 2 | 5 | | Menelaus | 18 | 1 | 0 | | Dionysii finis & Menelai | 18 | 2 | 8 | | Plinius incipit | 7 | 2 | 0 | | Picolomineus seu clara supra annulum | 7 | 2 | 1 | | Initium fracastorii seu annuli | 21 | 3 | 0 | | Initium Posidonii | 23 | 0 | 5 | | Finis fracastorii | 23 | 5 | 5 | | Clara ante angulum promontorii acuti | 24 | 4 | 5 | | Angulus promontorii acuti | 25 | 1 | 0 | | Digiti IX, Palus Somni | 26 | 1 | 0 | | Initium Endimionis | 29 | 2 | 0 | | Initium Taurentii | 30 | 3 | 0 | | Angulus cornuum cum parallelo | 30 | 4 | 0 | | Hermetis initium | 31 | 5 | | Finis Taurentii sive capitis Serpentis | 31 | 4 | 0 | Her. | Hermetis finis | Proclus | Lymbus maris Caspii | Macula Inferior | Initium Langeni | Messa | Finis Langeni | Peninsula in Caspia | Finis Caspiae | Macula oblonga f. | Finis | |---------------|---------|---------------------|----------------|-----------------|-------|--------------|---------------------|--------------|-------------------|------| | 7° 32' 0" | | | | | | | | | | | | | 32° 20' | | | | | | | | | | | | 32° 29' | 33° 3' | 33° 10' | | | | | | | | | | 33° 5' | | | | | | | | | | | | 34° 24' | | | | | | | | | | | | 34° 40' | | | | | | | | | | | | 35° 40' | | | | | | | | | | | | 37° 50' | | | | | | | | | | | | 37° 50' | 37° 50' | 38° 13' | | | | | | | | | | 39° 16' | | | | | | | | | | | | 40° 41' | 41° 0' | 41° 41' | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Initium emersionis | Grimaldus | Grimaldi finis | Gallileus | Mare humorum | Schikardi medium | Aristarchi initium | Aristarchi medium | Aristarchus totus | Gassendus totus | Kepleri initium | Keplerus totus | Morinus | Finis insulae Kepleri | Capuanus totus | Initium terrae pruinae | Virgo | Aura inter Pitheam & Keplerum | Harpalus & clara ante Copernicum | Digitii III. | Bullialdus | Initium Copernici | Tychonis initium | |------------------|-----------|-----------------|-----------|--------------|------------------|--------------------|--------------------|------------------|-----------------|----------------|-------------|--------|--------------------------|----------------|------------------------|------|--------------------------------|--------------------------------|-------------|-------------|------------------|------------------| | 9° 21' 30" | 22° 44' | 23° 40' | 24° 35' | 28° 15' | 29° 0' | 29° 44' | 30° 20' | 30° 25' | 31° 0' | 31° 40' | 31° 6' | 32° 24' | 34° 22' | 34° 40' | 35° 43' | 37° 0' | 37° 20' | 9° 37' 34" | 37° 40' | 38° 30' | 39° 0' | 40° 0' | | | | | | | | | | | | | | | | | | | | | | | | | | Copernicus totus | 9 40 18 | |------------------|---------| | Pitheas | | | Tychonis medium | 41 0 | | Tychonis finis | | | Digiti IV | | | Tymocharis totus | 45 30 | | Plato incipit | | | Digiti V | | | Plato totus | 47 0 | | Plato totus | | | Insula sub sinu medio | 50 0 | | Finis sinus medii | 50 50 | | Archimedes | 51 37 | | Digiti VI | | | Manilius | | | Fretum | 54 22 | | Abifeldeæ initium| 54 40 | | Abifeldeæ finis | 55 30 | | Aristoteles & Eudoxus toti | 56 0 | | Digiti VII | | | Dionysii initium | 57 12 | | Menelaus | | | Dionysii medium | | | Menelaus totus | | | Dionysius totus | | | Digiti VIII | | | Ostium lacūs mortis | 10 2 0 | | Plinius | | | Promontorium supra Dionysium | 3 0 | | Plinii finis Posidonius | 3 40 | | Promontorium acutum | 5 30 | | Hermes | | | Digiti IX | | | Chorda umbrae 8 digitorum | 9 30 | | Messala | | | Initium maris Caspii | 13 30 | | Langrenus totus | | Chorda Monsieur Gallet's Observation of the Solar Eclipse on the 11th of June, 1676. Observatio Solaris Eclipse Alta Avenione die 11. Junii 1676. Ante Eclipse. DE BILS precedentibus, locum aptissimum elegimus in quo aere puro frueremur, videlicet Conventum RR. PP. Carmelitarum disclaeatorum, qui respectu Civitatis Aven. ad ortum vergit & mania stringens aere, fumo & vaporibus urbanis libero gaudet; in medio horti cameram obscuram tapetibus construximus, & in ea instrumenta ad observationem necessaria ritè collocavimus. Tubospicillum aptativimus lente oculari concavâ & objectivâ convexâ instructum, duplicem habens motum firmo sustentaculo, verticalem scilicet & horizontalem, affixam tabellam immobilem firmatis cochleis secum circumducens oculari vitro semper parallelam chartâ candidissimâ indutam, in qua solarem faciem, distantiâ tubospicilli determinatam descriptimus, hujus diametriam circulis concentricis in duodecim digitos divisimus, & quolibet digitorum in partes sexagessimas. Loco quadrantis qui pluribus indiget cautionibus & nimium obnoxius est vacillationibus, in hac praecipue regione in qua ferè semper sitat Aquilo qui perpendiculum agitat, Gnomonem ad captandas umbras Solis in partes 400. optimè divisum dispositum ita ut liberè moveretur situm verticalem ope perpendiculi conservans. Tandem horologium rotatile minuta prima & secunda indicans motu penduli cum cycloide preparavimus. Tempore