1294 
[0.0011820] — n? Bs, { 
Re en - rea eee oe 
sin 1 Le or," A 
Using now the value (1) of 6, or 
b 
— = (1 4-58) (1 — je), 
r; 
and the values (2) and (5) of 7, and g,', and taking 
u-! = 81.50 + 0.07 
we find 
n= BATS GOS (P= Pele io 2: 7. EAN 
The uncertainty of the numerical factor may be estimated as 
follows : 
dice. tar, +2, 171 44 a Bes 
EE) atis ee Peep + 0 „006 
ne ak ne ee 
In the following paper we will derive the value 
e—l => 296.0. 0.2. 
This gives 
x’ = 3422"544 + 0".015 Tr eee 
The mean error includes the effects of r,, g, and u as given 
above, to which has been added: 
dus tes waste E00 
From the recent determination of the lunar parallax by the obser- 
vatories at Greenwich and the Cape!) — assuming the corrections 
given to be applicable to Hansrn’s parallax 5422".07 — we find the 
following comparison : 
sl Cape-Greenwich Formula (7) 
293 3422".60 3422".58 
294 4 ‚57 
295 ‚48 Oo 
296 42 54° 
297 36 59, 
This would give: 
e—! — 293.4, z' = 3422".58. 
With e=! = 296.0 would correspond the observed value 2'=3422".42, 
which is O'.12 smaller than (8). It does not appear impossible to 
ascribe this quantity to errors of observation, especially to a constant 
error of pointing on the Crater Mösting A by the observers at 
Greenwich and the Cape. 
1) Monthly Notices, Vol. LXXI, page 526. 
