^H^^itAL AND LITERARY. 95 



texatM; then to compute the variation of pa- 

 rallaxes, for the given time, fr-om noon. 



9. The meridian par. Ion. D « is MI or CH ; 

 and the meridian par. lat.' 1> a (D is M H or 

 CI: for finding which. the requifites are, 



CoC } °f »h^ ^**- °^ ^ P'^'^' "j' To be foun4 



Con \ °^ '^^^ declination of the fun, j> from the 



Sine ? . . I Tables. 



r f \ of PCN = complement of the meridian angle, J 



r^r^— S, lat. pi. X cof. decl. O C North 7 if the lat. C North. 

 »-'*-— R —] : .^-South J pi. be i South. 



Qvj_ Cof. lat. pi. X S, decl. Q of a contr. fpec. to the dec!, q. 



^ , . C DiiF. y of 6 C'and O i/L, if they C the fame 7 n„^ -^ 

 ^M=tsu9i.5,areof ,. . . idifFerent 5 ^^'''''^ 



.- ., 1 v^-'i<^Ti>rV— rj/-'_^3VJ^coT.nierid,an?. 

 Merid. par. Ion. D a 0=Ml=:HC= ^^ &. 



Eaft 7r r. C Summer 7, ,, C Winter 7 folftice C North. 

 Weft 5^'°"'^^^| Wimer j^othej Summer 5 if CM h| South. 



^ _„__,_ CMXS, merid. ang. C of a contr. 

 MerLd. par. lat. D « © — Ivltl— IL — — ■- ^ — ■- ^ f^^^^ ^^ ^.^^ 



ID. The variations from the merid. parallaxes 

 for the given hour from noon» may be conceived 

 to be made up, each of two parts j which are the 

 projedions of MG and GV upon CW for the Ion. 

 and upon CN for the lat. ; the former being HK, 



