- 
106 “ESSAYS any OBSERVATIONS 
oc= S: lat. pl_ x cof dec. © § North 2 if the Jat. North. 
a | a an South § pl, be South, 
anes Cof. Jat. e XS, decl. © of acontr. {pec. to the decl. ©. 
Diff. 2? of OC and OM, if (the fame A 
cM= he they are of different § SPEcies. 
CM X cof, merid. ang. 
7 R 
Merid. par lon, D) 4 O=MI=Hc 
Eaft Sum ? Win. ? folfti 
fi the . toth in. ¢ lolitice North, 
Wel as Win, 3 ei, Sum. if C Mis South. 
. CI , merid. 
Mer. par. lat. ) @ @=MH=IC= vet RE of a contre 
fpec to CM, 
10. THE variations from the merid. 
parallaxes for the given hour from noon, 
may be conceived to be made up, each 
of two parts; which are the projections 
of MG and GV upon CW for the lon. 
and upon CN for the lat.: The former be- 
ing HK, KB; and the latter IL, LA. For 
os which, befides the aie eS: re=- 
quifites, there is required 
Sine 
Verf. Sine ‘ cf the degrees from noon. 
Mc=2 Mx ie deg. 2 noon, 
Cof, lat. pl. S, deg. d@ noon 
cv=cok lat P x deg : 
Variation 
