OBSERVATIONS ON THE TERRESTRIAL GLOBE 317 



north ; and the sun to be any where in the ecliptic, be- 

 tweenthe middle of Taurus and the middle of Leo; ifvliL&DL 

 the quadrant of altitude be set to about* 19 degrees 

 north of the east in the horizon, the sun's place be 

 marked with a chalk upon the ecliptic, and the globe be 

 then turned westward on its axis, the said mark will 

 rise in the horizon a little to the north of the quadrant, 

 and thence ascending, it will cross the quadrant towards 

 the south ; but before it arrives at the meridian, it will 

 cross the quadrant again and pass over the meridian 

 northward of Barbadoes. And if the quadrant be set 

 about 18 degrees north of the west, the sun's place will 

 cross it twice, as it descends from the meridion towards 

 the horizon, in the afternoon. 



8. In all places of the earth between the equator and 

 poles, the days and nights are equally long, viz. 12 

 hours each, when the sun is in the equinoctial : for, in 

 all elevations of the pole, short of 90 degrees (which is 

 the greatest) one half of the equator or equinoctial wifl 

 be above the horizon, and the other half below it. 



9. The days and nights are never of an equal length 

 at any place between the equator and polar circles, but 

 when the sun enters the signs <r Aries and Libra. 

 For in every other part of the ecliptic, the circle of the 

 sun's daily motion is divided into two unequal parts by 

 the horizon. 



10. The nearer that any place is to the equator, the 

 less is the difference between the length of the days and 

 nights in that place ; and the more remote, the contrary. 

 The circles which the sun describes in the heaven every 

 24 hours, being cut more nearly equal in the former 

 case, and more unequally in the latter. 



11. In all places lying upon any given parallel of 

 latitude, however long or short the day or night be at 

 any one of these places, at any time of the year, it is 



Note 90. From the middle of Gemini to the middle of Cancer, tl*e 

 quadrant may be set 20 degrees. Note by the Author. 



