M. DE Zack's Ajtronomical Obfervaiiom. 
14 1. 
True mid-dav concluded by the fun’s correfpon - 1 
dent altitudes as the clock marked J 
Equation of the mid-day 
Retarding of the clock at the rate of 1' 35" 1 
per 24 hours - - J 
True mid-day the pendulum clock fiiould 1 
have marked - - - J 
Mid-day concluded at the gnomon of the 1 
obfervatory - J 
Difference, the error of the meridian line 
or gnomon - - - 
the 
1 8th 
Mar. 
h. , . 
II 48 42 
- 18 
+ 13 
II 48 37 
11 48 56 
19 
the 
igth 
Mar. 
h - / // 
11 46 51 
— 18 
+ II 
II 46 44 
I I 47 3. 
19 
From thence I concluded, 
h. 
Mid-day at true folar time 11 59 60 
Mid-day the clock fiiould 1 g 
have marked on the 1 8th J ^ 37 
Retarding upon true folar 1 
time j 
ir 23 
/ // 
Mid-day atequated folar time 12 8 15, 
Mid-day the clock Ihouldl g. 
have marked on the 18th/ 11 ^ 37 
Retarding, upon equated! 
folar time - X ° 3 ! 
Obfervations 
