For sin? p‚ = 1/,; this gives 
Oe: 
Hayrorp and Bowie!) have 
g = 9.78038 {1 + 0.005304 sin? p — 0.000007 sin? 2}, 
from which 
~J 
de) 
an 
he 
(3) 
9, 9.79762. 
The fundamental determination at Potsdam by Ktunen and Furr- 
WANGLER, V1Z: gp= 9.81274, combined with the value of ¢, which 
will be derived in the following paper, viz: e—! = 296.0, gives 
Gp ahd WO ie Cara, a ny cay Le OD 
I adopt*) this last value (3’). 
We then find the attraction of the earth by the formula 
= 2 122 145 Br 
JT ar ha le = aga. OT pe Lure (4) 
where 
Se 8 20, 
0, = = =" = 0.0034496), 
M og, 
e — 0.00338, B, = 0.0000029, 
which gives 
0 SBO: Eran red eS ALE) 
sin ” : 
3. Now let »a'=-——W be the constant of the lunar parallax. 
Sin 
By Brown’s theory we have 
b 
x’ = [0.0003940] — , 
a 
where the number in square brackets is a logarithm, and by Kerrer’s 
third law 
a’n? = fi (1+) *) 
We find thus 
1) Effect of Topography and Isostatie compensation upon the intensity of gravity 
(second paper) U. S. Goast and Geod. Survey, speciai publ. No. 12, page 25. 
*) In the original Dutch communication the value (3) was adopted. The difference 
is negligible. 
35) The quantity which is commonly used is 
os 
D= — , + $0,’ = 0.0031676. 
Jo 
+) Strictly speaking this value of M is not exactly the same as that used in 
(4), since the latter is exclusive of the atmosphere. The mass of the almosphere 
is 0.000000865 M. The effect on 7’ is 0”.001. 
