tnd 
FE. Loomis— Contributions to Meteorology. 1i 
mountains, and the precipitation of the vapor is due not to any 
special coldness of the mountain, but to the cold of elevation ; 
and the extraordinary amount of the rain-fall is due to an unu- 
sual combination of circumstances, viz: 1. The high tempera- 
ture of the air. (During the months, April to September, the 
mean temperature of the air at Calcutta is 84°4 F., and at 
Chittagong, 81°'9.) 2. Its great humidity coming directly from 
the Indian Ocean. (During the months, April to September, 
- tem of winds as at No. 1. 
os. 4-7 are situated on the west coast of Hindostan, on the 
range of mountains parallel with the coast, and 98 per cent of 
all the rain at these stations falls during the five months from 
June to September, inclusive, during the prevalence of the 
southwest monsoon. 
_ Nos. 8 to 10 are situated on the island of Java, and the rain 
is distributed pretty uniformly through the different months of 
e year. A chain of mountains extends through the center of 
this island from west to east, with peaks varying in height from 
4,000 to 12,000 feet. No. 11 is on the west coast of the island 
of Sumatra. This island has mountains rising to the height of 
14,000 or 15,000 feet. No. 12 is also situated on a mountain- 
ous island. The last five stations during half of the year are 
within the limits of the southeast trade winds, but during the 
remainder of the year the winds blow from the west or south- 
west. No. 13 is situated on an island with mountains over 
5,000 feet high, and abundant rains occur in all months of the 
year. No. 14 is near the belt of calms which separate the 
northeast from the southeast trade winds. 
we institute a similar comparison of the subsequent cases 
in the table as far as No. 204 we shall find that they may be 
Classified as follows: 
1. Stations on the north and east of the Bay of Bengal, 
where the rain comes almost wholly with the southwest mon- 
Soon, viz: Nos, 1-3, 15-21, 42-54, 120-188. 
2. Stations on the west and south part of Hindostan and 
Jeylon (including a few interior stations), where the rain is also 
Confined almost entirely to the southwest monsoon, viz: Nos. 
4-7, 22-96, 55-71, 189-148, 
_ 8. Islands situated within the tropics (including a few sta- 
tions in China, Australia and New Zealand), generally having 
mountains rising to a height of several thousand feet, viz: Nos. 
“18, 27-35, 72-1038, 149-183. 
Stations on the eastern coast of the American continent, 
AM. Jour, oo Series, VoL, XXIII, No. 133.—January, 1882. 
