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# Title: Nicolai Mercatoris Holsati, è Soc. Reg. Institutionum Astronomicarum Libri Duo, De Motu Astrorum Communi & Proprio, Secundum Hypotheses Veterum & Recentiorum præcipuas; Deqve Hypotheseon ex observatis constructione (shelfmark Leibn. Marg. 63)
# Folio 245, page id 820424455:0267
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Sect. 4.
ASTRONOMIL
243
lec. 52. _ Crus ac min. 3I. (ec. 46. Guxeritur per 47. Y.
erus alterum de, inveniturque win. 55. Sec. 24. quae est
linea curriculi Lunaris ab inicio Fclipleos ad medium obscu.
rarionis; cui aequalis est ef, linea a maxima obscuratione
ad tinemulque peragranda. Tum dices per Regulam erium:
Si min. 33. sec. 26. dane horam unam, live (cc. 3600;
quid dabunc min. 55. sec. 24 3 Prodeune ROC. L. MIn. 39.
lec. 55. quae cA dimidia duratIo.
D. hor. min. seb.
Cemp. apP. MaX. Obscu. Paris. JaB. +L 08 45 052Adde 
Dimidia duratio 00 Or 39 55SSuber.
nirium Eclipscos 1F 0705 10
Finis TX 10 2500
Toca durario 00 03 1950
Denique pro quancirare Felipleos detinienda,
Min. seco
Auter latimdinem LunX a C 3Y 46
Ex semidiamerro umbrae correcta ah 45
55
Restat ch 14 09
Adde semidiametrum L. unX ei 17
57
Fic ih pars diamerri Lunaris umbrae immerta 32 06
Cum dic per Regulam trium: Semidiameter L unX ci
valet 6 digiros; quancum valet i h = min. 32. ICC. 6 PrO-
deune digiri celiprici 10. Tcr. 44. Iquxe eA quancitas
cclixleos quaesita.