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XXII. 7 'be Procefs of making Ice in the Eaft Indies. By 
- Sir Robert Barker, F. R. S, in a Letter to Dr. 
Brocklefl:»y. 
TO DR. RICHARD BROCKLESBY, F. R. S. 
Spiing-GarJens, 
^ I March 2, 1775. 
Redcie, Mar. 9, f g procefs of making ice in the Eaft 
A Indies having become a fubjedt of fpe- 
ciilation, I beg permiftion to prefent you with the me- 
thod by which it was performed at Allahabad, Mootegil, 
and Calcutta, in the Eaft Indies, lying between 257 and 
2 3 y degrees of North latitude. At the latter place I have 
never heard of any perfons having difcovered natural ice 
in the pools or cifterns, or in any waters colle6ted in the 
roads; nor has the thermometer been remarked to de- 
fcend to the freezing point; and at the former very few 
only have difcovered ice, and that but feldom. But in the 
procefs of making ice atthefe places itwasufual to colle6t 
a quantity every morning, before Sun-rife (except in 
fome particular kinds of weather, which I fhall fpecify 
in the fequel), for near three months in the year: viz, 
from December till February. 
The ice-maker belonging to me at Allahabad (at 
which place I principally attended to this enquiry) made 
afuf- 
