22J

*° Lecture XI.

^e a ^ i/les and Seasons , for Days and for' Oen. i. That is, the Sun, by hislotion, affords the Measure forVf ’ an ^ b y Annual Motion the Mea-Vo W° r ^ Ears 5 ast d tbe Moon, by her Re-vs -j,.° ns » gives the Measure of another Part^ we call Months.fliof 0R ' it is a compleat Revolution of^tninaries that constitutes a Year, aV ; l ’ a nd a Day in the Abstract, or abso-^(1 C ° nbt ' lcre d- Hence it is necessary to\ ^, er the Point which is to be esteemed^Ojj X ° r ^ um or Beginning of these Revo-ss And this, with respect to the An-ev °hition of the Sun, is fixed in that: ^^the Ecliptic, which is the Beginning| h * e,r ; and the Time which the Sun takesj ^ ln S from, and returning to this PointS ’ is called a Year.

l/" S ° tbe Space of Time which thees to compleat one Revolution aboutis call’d a Natural Day , or theN including a Common Day

^ ; which Space of Time is subdi-

N 24 equal Parts, we call PIours ;

1 ^ e Ctl of these are again subdivided into^in • ^ artS or Minutes ; each of theseNt} ^0 60 other equal Parts call’d Se-Uiutes, or Seconds j each of these

into