Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 1: Opera mechanica

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306201DE USU HOROLOG.
Ut ſcias ope horologii horas inter binas
11
h. # m. # ſ.
5. # 30. # 10.
ex 12. # 0. # 0.
Reſtant 6. # 29. # 50.
5. # 20. # 6.
obſervationes elapſas, ſubtrahe horam ortus
Cui ſi addas horam occaſus
Prodeunt horæ inter binas obſervationes
elapſæ
22
11. # 49. # 56.
5. # 54. # 58.
5. # 30. # 10.
Quarum dimidium eſt
Quo addito ad horam ortus
Prodit hora horologii, cum ſol eſſet in Me-
ridiano
33
11. # 25. # 8.
0. # 7. # 45.
11. # 32. # 53.
Cui addita æquatione 21. Martii
Summa eſt
Septem diebus poſt ſc. 28. Martii obſervetur
ortus ſolis, quum horologium indicat
44
5. # 19. # 4.
5. # 25. # 4.
Et occaſus quum indicat
Ad habendas horas interim elapſas, ſubtra-
he horam ortus
55
5. # 19. # 4.
ex 12. # 0. # 0.
Reſtant 6. # 40. # 56.
5. # 25. # 4.
12. # 6. # 0.
6. # 3. # 0.
5. # 19. # 4.
Cui ſi addas horam occaſus
Prodeunt horæ interea delapſæ
Quarum dimidium eſt
Quo addito ad horam ortus
Prodit hora horologii cum Sol erat in me-
ridie
66
11. # 22. # 4.
0. # 10. # 1.
11. # 32. # 5.
Cui addita æquatione 28. Martii
Summa eſt
Quæ ſumma ſi fuiſſet eadem cum priori ſcilicet 11. 32. 53.
ad rectam menſuram diſpoſitum fuiſſet horologium; ſed cum
poſterior minor ſit priori, differentiâ exiſtente 49.
ſecundo-
rum, horologium ſpatio 7 dierum tanto tardius fuit promo-
tum, quæ 49 ſecunda diviſa per 7 numerum dierum, dant
quotientem 7 ſecunda differentiam diurnam, quâ

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