AT THE OBSERVATORY AT PARAMATTA. 
15 
j8 Crucis. 
1826. 
Barom. 
Therm. 
Stars observed. 
S. Pol. Dist. corrected for Polar point. 
Refrac- 
tion. 
I. 
II. 
III. 
IV. 
inches. 
Q / // 
/ // 
/ // 
/ // 
July 3 
29.69 
56 
direct 
31 28 31.5 
28 33 
28 36.7 
28 34.5 
5 
30.134 
58.5 
direct 
„ 28 32.0 
28 35 
28 38.3 
28 35.0 
6 
30.20 
49.2 
direct 
„ 28 32.2 
28 34 
28 39.8 
28 39.0 
10 
29-815 
57.0 
by reflect. 
261 20 30.4 
20 37.5 
20 29.0 
20 41.0 
11 
30.035 
48.5 
by reflect. 
„ 20 25.7 
20 34.3 
20 27.0 
20 35.0 
12 
29-980 
51 
direct 
„ 28 34.0 
28 33.0 
28 37.0 
28 34.0 
14 
29.96 
49 
direct 
„ 28 32.0 
28 39.2 
28 36.0 
28 35.0 
29.993 
52.74 
direct 
31 28 32.34 
28 34.8 
28 37.6 
28 35.5 
Means |i 0 5 
29-925 
52.7 
by reflect. 
261 20 28.05 
20 35.9 
20 28.0 
20 38.0 
7;0.9b 
o / // 
Half Difference by a mean of the 4 Microscopes .... 114 55 58.71 
Middle of the Refraction „ „ 26.96 
Middle of the Refraction „ „ 26.96 
114 56 25.67 
True Zenith Distance 24 56 25.67 
Apparent Declination 58 45 13.40 
Latitude 33 38 47.73 
Each of these observations separately gives the points of the division of the 
mural circle answering to the horizon, so that the latitude may be derived from 
every observation made at those periods on stars of a known declination. 
The southern solstice, December 1827, observed alternately direct and by 
reflection with the repeating circle, whereof the abstract is given page 39, gives 
for the 
o / // 
Mean Zenith Distance of the Tropic of Capricorn 10 21 4.2 
Mean Obliquity of the Ecliptic 23 27 43.3 
Latitude 33 48 47.5 
Summing up, therefore, the latitudes found by observations alternately direct 
and by reflection, we have 
Latitude. 
By Solstice, December 1827, with Repeating Circle 33 4 8 47.50 
Near the same Solstice, six observations with Mural Circle „ 52.10 
Solstice, December 1828, with Repeating Circle „ 47.81 
Ditto Ditto Mural Circle „ ,, 49.35 
