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 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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