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.

The Example.

Suppose that you would knowe what latitude the Moone had the first of Nouember 1590. here resorting to the diurnall Table of the Ephemerides, you find according to the day propoūded, the place of the Moone to be in the 16. degrée 49′· of Taurus, and the place of the Dragons head to be in the 28. degrée 14′· of Cancer. Now according to the rule before giuen, you must take the place of the dragon here, which is 28. degrées, 14′· of Cancer out of the 16. deg. 49′· of Taurus, which is the place of the Moone, and be∣cause you cannot take the greater sum out of the lesser, you must adde to the lesser sum 12. signes, which make 360. degrées, and also one signe, for Aries going next before Taurus, in which signe the Moone is, so shall you make the whole sum to be 13. signes 16 degrées 49′· out of which summe you must subtract the Dragons head, which with the signes that goe next before Cancer, coun∣ting from the first point of Aries, do make 3. signes 28. degrées, 14′· which being subtracted out of 13. signes, 16. degrées, 49′ there remaineth 9. signes, 18 deg. 35′· out of which you must al∣so subtract 90. deg. which is 3. whole signes, & so you find the re∣mainder to be 6. signes, 18. degrées 35′· with which last remainder you haue to enter into the table of the Moones latitude, in the foot

wherof you shal find 6. signes, and in the last collum on the right hand 18. & in the next collum towards the left hand, & in the com∣mon angle answerable aswel to the said 18. degrée. as also to the 6 signes, you shal find the latitude of the Moone to be 4. deg. 45′· & 17″· (which seconds may be very wel omitted) and her latitude to be south. But now because there are 35′· more annexed to the 18. degrées of the foresaid remainder, you must find out a proportio∣nall part answerable to those minutes which is to be done thus.

Take out of the table the whole latitude answerable to 6 signes & 19. deg. which is one degrée more, so as now the latitude of the Moone is 4. deg. 43′· omitting the seconds. Then subtract 4. deg. 43′· out of 4. degrées 45′· & there remaineth 2′· Now to find out a proportionall part answerable to the former 35′· you must say thus. If 60′· require 2′· what shall 35′· require? and the quotient yéeldeth 1′· 10″· which being subtracted out of 4. degrées 45′· there wil remaine 4. degrées. 44′· and so much was the south latitude of the Moone at that present day.