1067 
In the years of transition mentioned sub 1°, evidently the rainfall 
is also in a state of transition; the signs of the departures are 
changing and have no fixed character. 
On the contrary all Eastmonsoons mentioned sub 2° without 
exception have been too wet in West- as well as in East-Java, 
whereas of the Eastmonsoons mentioned sub 3°, out of 9 cases 8 have 
been too dry in West-Java and out of 8 cases 6 too dry in East-Java. 
It cannot be denied that among the favourable cases there are 
some in which the departure is but small. but on the other hand 
it is a matter of fact that with 2 of the 3 unfavourable cases the 
departure also remains small. In these years the character of the 
monsoon has been indefinitely developed, or has been different in 
different parts of Java or, as occurred in 1911, the character was 
different during the different months. Certainly 1911 must be 
reckoned among the dry years, even though the heavy rainfall in 
June caused a positive departure in East-Java. 
It must be remarked that to the numbers given for 1876— 
1878, as taken from the observations of only one station, but little 
value can be attached. It is however a well known fact that 1877 
was a dry year over the whole of Java and that therefore the 
strong negative departure observed in Batavia has a general validity. 
Above has been given a scheme of barometrie changes and cor- 
responding fluctuations of rainfall which may be applied to 23 
years out of the 37 of the period 1876—1912. If we exclude the 
year 1876 for the above mentioned reason, this scheme gives for 
15 years (mentioned sub 2 and 3) a definite answer to the question 
what was the sign of the rainfall departure in the Eastmonsoon 
in Java. With one exception in West-Java and two exceptions in East- 
Java this sign corresponds with reality. 
On the principle upor which the scheme has been based it also 
would have been possible to forecast for these 15 years the sign of 
the rainfall departure in West-Java 14 times, in East-Java13 times, 
if we had considered that the term should be taken somewhat shorter 
at the beginning and at the end of a regular wave series e.g. half 
a year, whereas it might be taken longer between them, even 1 or 2 years. 
What may be concluded from the scheme for the near future 
about the rainfall in Java? The cireumstances for a forecast may 
presently be called really favourable, because a new regular series 
of barometer waves has already made its appearance during the 
present sunspot minimum. 
We have already passed the barometer maximum and the pressure 
