11. Note on the calm region in the atmosphere above 
_ Caleutta, which, during the cold season, is at a height 
of about 3,000 feet. 
By C. Lirtir. 
For many years I have had a desire to obtain definite informa- 
tion regarding the air movements at different heights above us : 
and at times I have collected items of information which, however, 
necessity is readily proved by a reference to weather 
reports and the attempts to forecast the weather during the 
coming 24 hours. These attempts are on no higher a basis than 
the mail forecasts which one reads of in the newspapers, depend- 
ing, as these do, on the telegraphed reports of the departure and 
probable arrival of the mail steamer. Until other information 
can be brought in nothing better can be anticipated. 
Ever since I began to see that more information was necessary 
towards the solution of weather problems, I have been wonderin 
how far it is possible to penetrate into the secrets of the air over 
Calcutta, in a cold season day, say, with blue sky everywhere and 
not a cloud visible. When there is cloud visible something can 
strong, and must be held by steel wire, of which they will take 
out perhaps several miles. They cannot, therefore, be used 
except in winds of 10 to 20 miles an hour. Such would be useless 
in Caleutta, except on a few occasions each year, and then they 
I used them were so still that even 
the lightest kites with the lightest thread would not zone ap 
of themselves. They had to be kept continually going | aA 4 
jerks with which kite-fliers are familiar. By — oa aa a 
kept them up at a height of two or three hundred ,u 
