( 188 ) 
As the hours of observation are not the same as those at which 
the observations have been made at Telok- Belong, new formulae 
had to be applied; the method however being essentially the same, 
the results of the computation only may be given here. 
Sabang. Oleh-leh. 
H % H x 
So 24.1 cM. 310° 13.3 cM. 329° 
M, 46.6 266° 23.0 285° 
Ky oe 291° 6.3 318° 
O 3.5 274° 2.3 323° 
f 2.1 10° ? ? 
iN. 8.3 265° 3.0 286° 
ne 4.9 312° 4.2 Boor 
Sa 9.2 165° 8.8 65° 
Ssa 8.5 114° 6.8 145° 
W 202.8 118.5 
The tidal constants for Oleh-leh have been computed from three 
series of observations made during three years from 1895 to 1898; 
it appears that the tide P is so small that it cannot be calculated 
with any degree of accuracy from the given data, which is proved 
by the fact that the three determinations for the different series 
widely differ. 
No more importance can be attached to the constants of P in 
Sabang-bay, because its argument cannot possibly be 10°, but must 
be somewhat smaller than 291°, the argument of 4). 
For the rest the conformity of the arguments of Sand 4, Ms and 
N, and the differences between those of Sy and Ms, A, and O are to 
be considered as so many proves of the reliability of the results. 
The influence of the wind cannot be determined, as for neither 
station a calculation of S, can be effectuated from the available 
data; it cannot be of great importance because otherwise the differ- 
ence between the arguments of Sy and Ms, which is 44° — 1.80 
days, i.e. quite normal, would be sensibly affected. 
As, for all practical purposes, both tides may be considered as 
almost exclusively semi-diurnal, it is possible to assume a constant 
difference of time; this difference Oleh-leh minus Sabang is: 
