( 2 ) 
three months in th<^ year during the season of torrential rains 
the lake receives an enormous amount of fresh water from the 
rivers flowing into the southern and south-western portions. 
During the remainder of the year this shallow stretch of water 
is subjected to the fierce rays of a tropical sun. The results 
of the water examination are what one would expect — a very 
low degree of salinity in December, the wettest and coolest 
month of the year, and a very high salinity in June the hottest 
month of the year, and the centre of highest salinity shifts 
from the mouth of the lake (December-February) to the head 
of the lake (June-October) with a transitional state of affairs 
in March, April, and May, and also in November. 
An exammation of charts 1 to 12 is interesting, as they show 
the distribution of water of different salinities for each month 
of the year. No. 1 refers to the lowest salinity and No. 8 to 
the highest. There is no relation as regards degree of salinity 
between the numbers in the different months. Thus, the 
highest salinity in December is less than the lowest salinity 
in June. These charts are therefore only valuable as indicating 
relative salinities. The actual specific gravities are given in 
the detailed statement found in Appendix I., and a summary 
of these results is given in Appendix II. 
It is interesting to note that the centre of highest salinity 
moves along the northern portion of the lake starting from the 
entrance of the lake in December with the advent of the rains, 
taking up a position at the entrance of the lake for about 
three months from December, and then slowly shifting its 
position back to the head of the lake along the northern portion 
during the months of Febriiary to June. This centre remains 
at the head of the lake till October when the centre of high 
salinity returns to the entrance. Similarly, the centre of 
lowest salinity moves slowly along the southern portion of the 
lake. From November to April the centre of lowest salinity 
is at the head of the lake, and as the year goes on the centre 
passes eastwards along the southern section of the lake, and 
ultimately takes up its position at the mouth of the lake in 
July, where it remains for about four months. Chart 13 
gives the tracks of the highest (continuous line) and the 
lowest (broken line) throughout the year. 
