494 Trans. Acad. Sci. of St. Louis. 
comes out + 0.82. This anomalous result is in part due to 
the small average number of observations of each pair and 
indicates that the errors of the declinations of the stars are 
small as compared with the accidental errors of observation. 
In a case like this it is about as well to give the same weight 
to the results of the different pairs. Nevertheless the weight 
of the mean result for each pair has been computed by the 
usual formula, taking e = + 0.80. 
1 
Z 2 4 2 
tent 
[See Chauvenet, Vol. lI, p. 356.] 
These computed weights are given in the last column of 
table VI. The simple mean of the 48 results for latitude 
is 38° 56’ 51”.628, and the weighted mean of the mean 
results for each pair is 38° 56’ 51”.645. The weighted mean 
is adopted and we have as the final result of this determination 
of the latitude of the pier of the transit instrument of the 
Laws Observatory, 
¢g =+38° 56’ 51”.645 + 0”.103 on July 17th, 1882. 
As before stated, the declinations of the stars used in this 
determination have been rigorously reduced to the system of 
declinations of the Berliner Jahrbuch, and therefore this value 
of the latitude must be considered as referred to the same 
system of declinations. 
