86 Means of making Ice by the Natives of Bengal. [ Fes. 
Abstract of a Table of 11 years’ Observations onthe Temperature of the Air at Chin- 
surah between the dawn of day and sun-rise, during the season of Ice manu- 
facture, by Mr. Herklots, Fiscal of Chinsurah. The thermometer at the Ice-fields 
generally stood 6 or 7 degrees lower; but this is not shewn, except im the last 
year from Dr. Wise’s Observations. 
1831-32. 1831-32 
s 2 Ss >) 
Mean temperature of the rr |= E\o\ 5 
air at Chinsurah. 3 é z = 5 é z = 
Sic = 5/8 |S] = 
o 0 Q 
1819-20. Dec. ...... 54.6 |Nov. 6 to 20,| 59.0 clo 
Aion sueoc 49.9 |December 8,|56.0|..| a@| NE. |January 52|..1q] Sw. 
HED ai scicisic 55.0 9 to 23,|56.7|.. Nw. 7,152|45| @| sw. 
1820-21. Dec........ 52.5 January 3,| 51. is 6 |NNW 28 54149 Ww. 
Jan. osns+. 51.4 4,|49. |44| @| Nw 29,|56/47|. | sw 
To . 53.1 5,| ? |45/6| Nw. 30,|60|59| ..| sw. 
1822-23. Nov 3 to 29, a o pes ra b| Nw. 31, 56/46). sw. 
Rye .olobenele , " 6 a\ Nw. 
Jan. 1 to 21, 55.0 B52" (45a | iw. Pere eet 
1824.25. Dec. 7 to 28, 54.6 9,/53. |50|..|NNW 3152/43 ae 
Jan. 2 to 19, 54.0 11,)58. |55| a| sw 4159\43 gp Oe 
1825-26. Dec.16 to 28, 54.2 12,/58. bo .. | NNW. 7 \57 52 i eh 
Ja. fe) ayers 53,0 13,|56. |54|..| Nw 18.160 ~~ 
Feb. 1 to 10, 55.0 14,/53. |47| a | NNW. 20.158 : 
1826-27. Dec. ...... 54.5 15,|52. 146) 6 [NNW 28° 60 
IAW baodoe 52.3 16,|49. |44| c| Nw. 29. 56 
1827-28. Dec. ...... 55.4 17,48. |42| c! nw. ii 
Wie son ace 52.2 18,|47. |41| ¢ | Nw.|March 1,|56 
Feb. ] to 19, 55.0 19,,49. |45| 6 | nw. 3,|56 
1828-29. Dec.18 to 31, 56.1 20,| 48. ; 16) Nw 9,|59 
Janse aysioee. 54.4 21,)50. 131|6! nw 11,|56 
Feb. 1 to 17, 54.8 22,|48. |45|a| nw. 12,158 
1829-30. Dec.5 to 31, 54.8 23,52. 147; b| nw. 14,|56 
Pisseutdee 52.5 24/50. |48) a) Nw. 15, 60 
Feb. no ice. 25,) 51 a! sw. | 
1830-31. Jan. J,..... 30.0 Number of days on which ice was formed in small 
Z ie BO ,0+°1B3-2.\"" "quantity (er), is.s «\shnal were anes enseiaing kant ee ae 
apepe ieee 55.2 Ditto ditto of an average amount, (Ohe SB hase 
Mar to Gth,. 54.4 | Nitto ditto very abundantly, (c), ...... nis jo. wees iene aatsd 
Total Ice-days in 1831-32.. 27 
Note. In lieu of the more copious table given by Dr. Wise, we have condensed his 
own and Mr. Herklot’s Observations into one table, which in fact shews all that bears 
upon the question of Ice-making, namely, the general temperature under which it can 
be formed, and the prevailing wind.—Ep. 
The result of the observations of last season, as shewn in the above 
table, proves that it is not by the temperature alone we are to judge of 
the number of nights in which ice is produced, for, owing to the frequent 
and heavy falls of rain and the number of cloudy days last season, there 
were very few nights in which ice was formed, although the tempera- 
ture was for an unusual number of mornings at the degree required for 
producing it. ‘The average number of nights in one season in which 
ice forms is from 25 to 30; of these there are about 18 favourable, in 
which the air is cold, the thermometer at Bandel under 54°, or, at the 
