(281 ) 
POS. | CHRON. MICROSC. A | M.B | LEV.| HOUR a | zaam 
R_|6n 43m3as | 189° 10 557 | 597] 561 54”) 14vt | 26m35e8 | — 3012 
L 49 34 | 80 55 37 |39|57|58|12.4| 20 32.8 423 
R 54 42 | 189 1 27 | 28) 97] 95 | 44.7] 15 23.9 
L 59 50 | 81 2 8 | 8| 29/97) 12.2] 10 15.1 4.10 
R |7 4 42 | 188 87 6 | 141] 12/42] 41.5] 5 22.3 
L 9 2 | 81 4 13 | 18| 36/33] 12.0] 0 38.5 1.25 
R 15 1 | 188 56 54 |58|56|55|13.4| 4 58.4 
L 19 22 | Sf 2 29 | 31] 49) 51] 44.7] 9 20.4 2.25 
R 23 41 | 189 0 47 | 19] 19| 16) 13.1] 13 39.8 
L 28 13 | 80 87 30 | 29) 54| 50] 41.7] 18 12.6 3.34 
R 32 34 | 189 6 59 | GO| 62| 60) 12.3] 92 34.3 
L 37 32 | 80 48 29 |33|54|50|13.7| 27 33.6 3.26 
From this observation and from one of n Ursae Majoris on the 
same night I derived as value of the run correction for 10'and for 
the mean of the two microscopes + 0.68. The temperature and 
the barometric pressure were found to be 25°.3 ©. and 760.7 res- 
pectively, while for the chronometer correction + 57™ 358.5 was 
accepted. 
These data allow us entirely to reduce the observations. In the 
table above I have added in the eighth column for each pointing the 
computed hour angle, and in the ninth the value for the latitude 
derived from each pair of pointings, from which we obtain as 
mean result — 5°12' 3.07". 
Leaving out of consideration the observations discarded on the 
principles stated above, we retain 23 observations, which reduced 
in the manner explained yield the mean results given in the table 
below. In this table the first column shows the position of the 
circle indicated by the reading for the zenith, the 24 and 34 give 
the date of the observation and the star observed, the 4th and 
5th the readings in the two positions @ and £ in full degrees, the 
difference of which is twice the zenith distance, the 6th the num- 
ber of double pointings made and the 7 the mean result for the 
latitude. 
19* 
