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.

Of the seasons and shadowes which they haue that dwell right vnder the Circle Arctique, and how long their day is. Chap. 23.

THey haue but one Winter and one Sommer, and their shadow alwaies tendeth sidelong & North∣ward. And because their Zenith being in the cir∣cle Arctique, is at all times of the yeare all one with the Pole of the Zodiaque: the Ecliptique line therefore must néedes be all one with their Horizon, whereby the one halfe of the Zodiaque in a very moment doth rise aboue the Horizon, and the other halfe in the same instant goeth downe, and as the whole Tropique of Cancer appeareth alwayes aboue the Horizon: So the whole Tropique of Capri∣corne is alwaies hidden vnder the Horizon, so as when the sunne entreth into the first degrée of Cancer, their day is 24. houres long and their night but a moment, so contrariwise when the sunne en∣treth into the first degrée of Capricorne, their night is 24. houres long, and their day but a moment, as you may plainely sée by pla∣cing the Spheare at the 66. degrée and 30′ of Latitude.