[ 453 ] 
ulgar way of reckoning, at 7 o’clock in the morn- 
ng, March 3. Either this day, therefore, or the 
preceding one, might, at that time efpecially, have 
been taken, indifferently, for the day when Ardturus 
rofe achronically. 
But tho’ this is what is properly meant by achro- 
nical rifing (19); yet as a (tar, at that time, is invifible, 
and, confequently, can be no rule for hufbandmen, 
for whofe uie thefe obfervations were intended ; there 
is another achronical rifing, called the apparent one : 
This is when a ftar firft appears above the eaftern ho- 
rizon afer fun-fet(2o); which, therefore, requires 
fome certain depreffion of the Sun in the oppofite 
part of the heavens, more, or lefs, according to the 
magnitude of the ftar required to become vifible. 
It was faid before, that in the year before Chrift 
880. Feb. 27. Ardturus rofe, at Athens, 19’ 20" afier 
Sumfet ; but whether this, tho’ a bright ftar of the 
farfl magnitude, could be feen there fo foon in the 
eaftern horizon as even at 30 min. paft Sun-fet, may 
well be queftioned : And therefore Feb. 27. or the 
60th day after the winter folftice, could not be there 
efteemed the day of the apparent achronical rifing of 
Ardturus. 
(18) Ft it ctv J v zl'Hx.of]* [xzta rptvsreif hzKtow 
Op. & Dief l- ii. v. 185. 
A/ ' 
q 'mf iycu 
Gemin. ibid 
I have 
S 
