166 SOME ACCOUNT OF THE 



vatories, after allowing . ^^~> JJ^J 

 for the difference ot y~ • , -J T j^ 

 longitude between the t> ~^ , . 1^5— *~*. "l*^? 

 places where they ftood, ^ ^- r£f* o J^ <■>**> 

 the obiervations and O pjjJ I y^*^ (^>^S-^ 

 calculations agreed. — j6c3 O J^=?1^L0 ^ 

 Hence he determined ^j^ |^ ,^ ^j^ (jf \j> 

 to erect iimilar obi'er- ^ ^f v ... x . > 

 vatories in other large ™ </* ^ °° i ^» 

 cities, that fo every per- Owj L» (^3 ^-m (^ULkw I 

 ion who is devoted to x^ V* ^^ g^^ ^ 

 thele ftudies, whenever *^ 4 b , _x£=5 i'^-* 

 he willies to afcertain <£ ^^ />£=> "^ 

 the place ot a ftar, or ^ ' . . * S^' <* 

 the relative iituation of ^ L^ •^ ^=* 

 one ftar to another, ^j '\ <Aa£=? fjkx+z &£= 

 might by thefe initru- ^(^ (j^, f VJT 

 ments obferve the phe- ^, Q* XlJ 

 nomena. But, teeing J ] v>.; .;;/v 

 that in many cafes it is t i^^ £>'J ^V^^ 1 

 neceilarv to determine * tJJui^* cL^J a£==> 

 pall or 'future pheno- , <wf Lc"^b* 

 mena, and alio, that in p^ " . . 

 the iniiant of their oc- ^Jy-o ^ J ^-V.^ 

 currence, clouds or rain a£==> lX^G sl£==> L-^dJL^ 

 may prevent the obler- o^ r Xj U o'r^ J /^ 

 ration, or the power ^ , JcXSlU^A 

 and opportunity ot ac- t iA ->l/ •• ^ 

 eels to an obfervatory ^ *X*a ^ <J^ J 

 may be wanting, he ^j. ^^ j^ 

 deemed it neceflary L$ . S S" ♦ . /^ | 

 that a table be con- (^j^lAfap^AAC^Ui 

 ftructed, by means of Jfc ^V^ 

 which the daily places ^Jt^jJUvLv^ 

 of the ftars being cal- 

 culated every year, and ^a3<^jO jc^j jrj/*^ 

 difpofed in a calendar, ^ . ^^ j^J ^^J 

 may be always in readi- ^ S ^^ ^ ^^ 



*?In the fame manner tl*V^. O U ^V ^>^ 



as the creomcters and L>j < — VjUj (^'c\^!^ ^j 



aitronomeYs 



