gS 6 Mr. Cavendish on the Civil Tear 
to 24 0 , is called the second teethee ; and so on till the full moon ; 
after which the teethees return in the same order as before. 
The civil day is constantly called by the number of that 
teethee which expires during the course of the day. 
As the teethee is sometimes longer than one day, a day some- 
times occurs in which no teethee ends. When this is the case, 
the day is called by the same number as the following day ; 
so that two successive days go by the same name. 
It oftener happens that two teethees end on the same day, 
in which case the number of the first of them gives name to 
the day, and there is no day called by the number of the 
last ; so that a gap is made in the order of the 'days. 
In the latter part of the month the days are counted from 
the full moon, in the same manner as in the former part they 
are counted from the new moon ; only the last day, or that 
on which the new moon happens, is called the 30th instead of 
the 15th. 
It follows from what has been said, that each half of the 
month constantly begins on the day after that on which the 
new or full moon falls; only sometimes the half month begins 
with the second day, the first being wanting. 
The manner of counting the days, as we have seen, is suffi- 
ciently intricate ; but that of counting the months, is still 
more so. 
The civil year, as was before said, begins at the day after 
the new moon ; and moreover, in the years which have an 
intercalary month, this month begins at the day after the 
new moon ; but notwithstanding this, the ordinary civil month 
begins at the day after -the full moon. To make their me- 
thod more intelligible, I will call the time from new moon to 
