ON THE INFLUENCE OF WEATHER UPON MORTALITY, 



325 



The Range of the Barometer. — Intimately associated with the previous inquiry 

 concerning the influence of the monthly mean height of the barometer upon the 

 mortality, is that of the influence of the monthly range of the barometer. Re- 

 ferring to Table C, we find the following relations exhibited between the two in 

 the several sections : — 



Section. Mortality. 



Maximum Section, 269-49 



Major Section, 233-25 



Minor Section, 214-26 



Minimum Section, 185-85 



Means, . 225-71 



Monthly Eange of Barometer. 

 1-564 

 1-363 

 1-163 

 0-961 



1-262 



The following table is composed of three factitious years, constituted severally 

 of months in which the monthly range of the barometer was greater than in any 

 of the corresponding months, of months in which the range was less than in any 

 other of the corresponding months, and of the mean monthly range of the six 

 corresponding months of the different years. 















Mean 





Greatest 



Least 



Mean 



Mortality 



Mortality 



Mortality of 



Months. 



Barometric 



Barometric 



Barometric 



with High 



with Low 



the Six cor- 





Eange. 



Eange. 



Eange. 



Eange. 



Eange. 



resjDonding 

 Months. 



January, , . 



1-855 



1026 



1-486 



243-4 



3041 



265-3 



February, . 







2-079 



1-289 



1-540 



330-6 



250-1 



257-4 



March, . . 







2-021 



1-270 



1-593 



250-0 



232-0 



249-8 



April, . . 







1-860 



0-734 



1-277 



290-2 



223-5 



242-8 



May, . . 







1 339 



0-498 



0-956 



210-4 



193-5 



219-5 



June, 







1-102 



0-652 



0-877 



219-1 



188-6 



208-6 



July, . . 







1-083 



0-745 



0-865 



181-3 



214-8 



204-5 



August, 







1-167 



0-661 



0-942 



178-7 



224-1 



189-4 



September, . 







1-172 



0-993 



1-082 



1650 



195-9 



187-7 



October, 







1-872 



1-201 



1-417 



204-4 



173-1 



198-2 



November, 







2-129 



1-295 



1-695 



236-0 



224-5 



237-1 



December, . 







1-853 



1-204 



1-429 



263-4 



2590 



247-9 



Means, . . . 



1-627 



0-964 



1-263 



231-04 



223-60 



225-68 



Both of these tables direct us to the conclusion that the mortality from all 

 causes bears a direct relation to the range of the barometer : the greater the range 

 of the barometer the greater the death-rate, and vice versa. And this is another 

 item in favour of the supposition that the mortality from all causes is greater 

 with a low than with a high barometer, because the greatest range of the baro- 

 meter is exhibited when the mean reading of the instrument is low. In the 

 latter table four months oppose what has now been stated respecting the in- 

 fluence of the barometric range ; they are January, July, August, and September ; 



VOL. XXIII. PART II. 4 u 



