Ex sola manu quo ingenio horam nocturnam colligas?, Finger watch for the determination of time at night, Fig. 19, p. 47, 1533, Petrus Apian: Horoscopion Apiani generale dignoscendis horis cuiusqumque generis aptissimum [...]. His accedit distantia[rum], altitudinum, & profunditatum per idem hoc instrumentum dimetiendarum ratio longe accuratissima & ingeniosa [...]. [Ingolstadt]: [Apianus], [1533]
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Ex sola manu quo ingenio horam nocturnam colligas?, Finger watch, determination, time, night, estimated date, Fig. 19, p. 47, 1533, Petrus Apian, Horoscopion Apiani generale dignoscendis horis cuiusqumque gener, accedit distantiarum, altitudinum, & profunditatum, idem hoc instrumentum dimetiendarum ratio longe accuratissima & , Ingolstadt, Apianus, 1533
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