M. Blundevile his exercises containing sixe treatises, the titles wherof are set down in the next printed page: which treatises are verie necessarie to be read and learned of all yoong gentlemen that haue not bene exercised in such disciplines, and yet are desirous to haue knowledge as well in cosmographie, astronomie, and geographie, as also in the arte of navigation ... To the furtherance of which arte of navigation, the said M. Blundevile speciallie wrote the said treatises and of meere good will doth dedicate the same to all the young gentlemen of this realme.

How to know by the Globe the Meridian altitude of the Sun, that is to say, his height at noontyde euery day through∣out the year, and how far he is then distant from your Zenith. Proposition. 12.

BRing the place of the Sun that day you seeke to the brazen Meridian, and staying it there, count vpon the said brazen Meridian how many degrees are contai∣ned betwixt the place of the Sun and the South point of the Horizon, and that is the Meridian altitude of the Sun for that day, which if you subtract from 90. the remainder wil shew how many degrees he is distant that day at noontide from your Zenith: as for example, supposing the Sunne to be that day you seeke in the first degree of Taurus, bring that degree of the E∣cliptique to the brazen Meridian, and stay it there vntil you haue

counted how many degrées of the said Meridian are contained betwixt the place of the Sunne, and the South point of the Ho∣rizon, and you shall find the number of degrees to be 50. which is the Meridian altitude of the Sunne for that day, which 50. degrées being taken out of 90. there remaineth 40. and so many degrées the Sun is that day at noontide distant from your Ze∣nith. The like order is to be obserued in séeking to know the Me∣ridian altitude of any Starre, or any other point in heauen.