YEEDET’S CONSTANT IN ABSOLUTE UNITS. 
23 
Set 1 (B). 
Passages in + direction, 
h m s 
6 39 2 
6 39 53J 
6 40 45i 
6 41 37 
6 42 28i 
6 43 20| 
Mean . . 6 41 11*83 
In — direction. 
h m s 
6 39 28 
6 40 191 
6 41 Hi 
6 42 3 
6 42 541 
6 41 11-26 
Time of middle negative passage : — 
From + observations 
From — ,, 
Mean . 
h m s 
6 41 11-83 
6 41 11-26 
6 41 11-545 
Interval between mean negative passages A and B, 16 min. 59-251 sec. 
If we divide by 3*693 the approximate period of a half-vibration, the nearest even 
wdiole number to the quotient will be the number of passages in the time. 
Dividing by 3*693 we obtain the quotient 275-99, which gives 276 half-vibrations. 
Dividing 1019-25 sec. by 276 we obtain for the time of one half-vibration 3-6929 
seconds. 
Set 2 (A). 
April 25, a.m. Mean temperature ll 0- 9 C. 
Passages in + direction. In — direction. 
h m 3 
9 53 3 
9 53 54i 
9 54 461 
9 55 38 
9 56 291 
9 57 21i 
h m s 
9 53 28i 
9 54 20 
9 55 12 
9 56 4 
9 56 55i 
Mean . . 9 55 12-0416 
9 55 11-9666 
Time of middle negative passage : — 
From + observations 
From — „ 
Mean . 
h m 's 
9 55 12-0416 
9 55 11-9666 
9 55 12-0042 
