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

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311206CHRIST. HUGENII INSTITUTIO (pone 1. Junii,) obſervetur mane ſol medius
11
h. # m. # ſ.
2. # 30. # 37.
ſupra horizontem quando horologium indicat
Et Veſperi iterum medius Sol infra horizon-
tem, cum idem horologium indicat
22
3. # 9. # 7.
Ad inveniendashoras interea elapſas, ſub-
trahe horam ortus
33
2. # 30. # 37.
ex 12. # 0. # 0.
9. # 29. # 23.
3. # 9. # 7.
12. # 38. # 30.
6. # 19. # 15.
2. # 30. # 37.
Reliquum eſt
Huic adde horam occaſus
Prodeunt horæ interea elapſæ
Quarum dimidio
Addito ad horam ortus
Habebis horam Horologii A, quum Sol erat
in Meridiano
44
8. # 49. # 52.
Eodem modo quæratur hora horologii B,
cum Sol erat in Meridiano, quæ ſit
55
8. # 38. # 5.
Sed hoc horologium ſingulis diebus 7. ſe-
cundis tardius motum retardatur ſpatio 101.
dierum a 2. Martii ad 1. Junii
66
0. # 11. # 47.
Quæ propterea ad inventam horam addita,
datur
77
8. # 49. # 52.
Id eſt, eadem hora, quæ per horologium
A.
inventa eſt; ad quam nunc addita æqua-
tione 1.
Junii
88
0. # 18. # 10.
9. # 8. # 2.
Prodit
Hæc eſt diei hora loci in quo horologia ad-
aptata ſunt, quæ cum coincidit cum meridie
loci obſervationis;
Differentia eſt
99
2. # 51. # 58.
Quare hic ultimus Meridianus tanto orienta-
lior eſt;
quibus horis reductis ad gradus,
1010
gr. # min. # ſec.
42. # 59. # 30.
uti ſupra docuimus prodeunt
Patet te hoc modo invenire longitudinem loci, in
quo meridie vel Sole exiſtente in Meridiano fuiſti;
quæ
differt a longitudine loci, in quo obſervas Solis

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