386 
PRESTON. 
The final results were: 
Station. 
Latitude. 
No. of ob¬ 
servations. 
No. of 
pairs. 
No. of 
nights. 
Haikn... 
o / // // 
20 56 2.57 ±0.12 
75 
28 
5 
Pakaoao. 
20 42 50.99 ± 0.11 
62 
27 
5 
Kaupo. 
20 36 40.75 ± 0.12 
90 
35 
6 
We therefore have the following data for the determina¬ 
tion of the deflection of the plumb line: 
Summary. 
Station. 
* Latitude. 
Geodetic. 
Astronomic. 
Haiku: 
o / // 
o / // 
Trigonometric station.. 
20 55 43.6 
Observatory... 
20 56 4.0 
20 56 2.6 
Kaupo: 
Trigonometric station... 
20 37 38.1 
Observatory...... 
20 37 41.0 
20 36 40.8 
Difference. 
18 23.0 
19 21.8 
Deflection of plumb line. 
0 29.4 
Pakaoao: 
Trigonometric station. 
20 43 21.2 
Observatory... 
20 43 21.6 
20 42 51.0 
The geodetic amplitude between Haiku and Kaupo is 
smaller than the astronomic amplitude by 58".8. Taking 
as a standard the latitude of the base-line on Maui, a deflec¬ 
tion of the plumb-line toward the north appears at all three 
stations, being 1".4 at the most northern one, increasing to 
29".4 at Pakoao, on the summit of the mountain, and rising 
to nearly a minute of arc at the southern station. These 
are,, however, merely relative values, and we cannot assume 
that the actual deflections are all in this direction or are ex- 
