( 290 ) 
Besides thit the number of the observations obtained leaves still to 
be desired and especially that they are deficient in that they all relate 
to the same limb, owing to which circumstance the resulting value 
for the longitude may be considerably vitiated by my mode of observ- 
ing the limb, there is still another reason why the results given here 
must be considered as only provisional. This reason is that not until 
later we shall be able to use in the computation places of the moon 
which are as accurate as possible. The provisional reduction was 
made by means of the data given in the Nautical Almanac, but 
the coefficients of the differential variations of these data were com- 
puted after the formulae of Prof. OUDEMANS, so that afterwards it 
will be easy to apply the required corrections. For the moment I 
have only applied provisional corrections for the mean error of the 
moon’s Right Ascension, as found at Greenwich for the year 1900 *); 
from these observations we get: Corr. RA. N. A. = + 08.13. 
In my reduction I started from the value for the longitude of 
Chiloango — 48™ 325 i. e. 48™ 328 east of Greenwich and until now 
my observations have yielded the following provisional corrections 
for this value: 
dL Daily Means. 
1901 Jan. 22 — 168.6 
> > + 2.7 — 65,9 
eer: Me ae ag 
» > a 46 
> » — 10.7 + 
Febr. 25 + 1.4 + 1.4 
March 3 — 14.3 
» » — 13.6 
» >» — 17.0 — 15.0 
May 1 —13.9 — 13.9 
» 21 4 54 
>»: >» — 5.0 + 0.2 
» 238 — 3.l 
» tk ba) — 0.7 
July 22 + 12.9 
> > + 13.5 
» DO + 11.8 
Mean value — 138.6 Be) 
1) Monthly Notices R. A. 8S. Vol, 61. p. 202. 
