[ 893 ] 
April being of an intermediate quantity, as it ought 
to be : for, Sirius being in conjunction with the Sun 
in June and July, it is evident he muft be then far- 
ther from the Earth than in December and January, 
when he is in oppofition to the Sun, and, conie- 
quently, his latitude and declination, which are both 
fouth, muft be lefs in the former cafe, tnan in the 
latter ; and therefore, as he paffes north of the zenith 
at the cape of Good Hope, his zenith diftance muft 
be greater in the former feafon, than in the latter, as 
the & obfervations indicate: but, in March and April, 
when Sirius is in quadrature with the Sun, and equally 
diftant from the Sun and Earth, his apparent latitude 
and zenith diftance muft be the fame as the tiue, or 
that which would obtain, if the Earth was tranflated 
to the Sun, and confequently, a mean between the 
zenith diftances in July and December, agreeably to 
the obfervations. 
I fhall now lay before you the obfervatipns them- 
felves, together with the calculations, which I have 
made’of the values of the parallax for each, the ma- 
ximum being affumed q , which I find will beft re- 
concile the obfervations with one another. 
5 Y 2 
1 75 1 - 
