kept at Calcutta, 1843-44 

 TABLE XX. 



555 



Shewing the mean monthly gradations of Temperature and Pressure for 

 the year 1843-44, as compared with the Ratio of Mortality. 





PifFerence of 

 Mean Temp, 

 from that of 

 the preced- 

 ing month. 



Difference of 

 Mean pressure 



Average. 

 Ratio of Mor- 





from preceding 

 month. 



tality month- 



November, 



— 3.80 



-f .234 



11.039 



December, 



— 6.49 



-f- .884 



10.351 



January, 



+ .24 



-f .014 



7.877 



February, 



+ 6.05 



— .022 



6.870 



March, 



+ 8.23 



— .222 



8.850 



April, 



+ 3. 



— .137 



10.232 



May, 



— 1.92 



— .093 



8.381 



June, 



— 1.87 



— .379 



5.822 



July, 



— 1.38 



+ .333 



6.671 



August, 



— .65 



— .001 



7.631 



September, 



+ 1.73 



-J- .146 



8.008 



October, 



— 1.80 



— .029 



1 8.895 



It is necessary to observe, that the temperature of September and 

 October last was lower than usual, the thermometer consequently 

 exhibits a less remarkable depression in November 1843 as compared 

 with October 1844, than it would be found to do in an average 

 season ; the result therefore of a wider survey of these registers for 

 a series of years, would show, I think, a still greater conformity be- 

 tween the two ratios in question. 



Thus the greatest average monthly Mortality takes place in 

 November, accompanied by a rapid full of temperature and increased 

 pressure, as indicated by the rise of the Barometer. But Mortality 

 diminishes, notwithstanding the increased intensity of these con- 

 ditions, in December and January. Again, we find the ratio of 

 Mortality to increase, (not with the increased ratio of temperature, 

 because the lowest scale throughout the year, as shown by Colonel 

 Sykes, is in June) with the ratio of variation ; whether of the falling 

 temperature of November, or the increasing heat of March. Some 

 such general rule in the ordinary course of seasons, would appear to 

 be indicated by the foregoing results, and however faintly, the subject 

 is well worth pursuing. 



