ON THE INFLUENCE OF WEATHER UPON MORTALITY. 



347 



2. Substantiates the suggestion, that the relationship between the mean height 

 of the barometer and the death-rate from zymotic diseases is inverse in the colder, 

 but direct in the warmer seasons. 



3. Confirms the statement, that there is no constant relationship observable 

 between the mean monthly height of the barometer and the death-rate from 

 phthisis, the results both of the two colder and of the two warmer seasons being 

 opposed to one another. 



4. Suggests a direct relationship between the mean height of the barometer 

 and the death-rate from bronchitis in winter, spring, and autumn ; but an inverse 

 relationship in summer,— a suggestion which, although not without conflict, is 

 supported by the results previously obtained. 



5. Shows that the influence of barometric pressure upon the death-rate from 

 all causes varies with age. In infancy the relationship between the mean height 

 of the barometer and the death-rate from all causes is probably inverse in winter 

 and spring, but direct in summer and autumn : in youth the relationship is in- 

 constant ; in adult life it is also uncertain ; in old age it is possibly nearly the 

 opposite of that which obtains in infancy. 



Resume : On the Influence of Brought and Humidity. 



■ Average monthly rainfall of the six winters, 3-33 inches. 



» „ ,. springs, 2-58 „ 



„ „ ,, summers, 3-17 „ 



„ „ „ autumns, 3-67 „ 



In the following table the upper lines represent the average mortality of the 

 months whose mean rainfall is severally ahove the standard of reference, whilst 

 the lower lines represent the average mortality of the months with a rainfall be- 

 low the standard : — 



Average mortality of nine, winter montlis, with 1 



a rainfall above, 3 "33 inches, J 



Average mortality of nine, winter months, with 1 



a rainfall hdow 3 "33 inches, J 



Average mortality of nine, sprmg months, with l 



a rainfall ohove 258 inches, j 



Average mortality of nine, spring months, with i 



a rainfall helow 258 inches, j 



Average mortality of eight summer months, ) 



with a rainfall ahove, 3"17 inches, . . . . / 

 Average mortality of ten summer months, with \ 



a rainfall helow 3'17 mches, j 



Average mortality of seven autumn months, ) 



with a rainfall above 3-67 inches, . . . j 

 Average mortality of eleven autumn months, ) 



with a rainfall helow 3-67 inches, . . . ) 



At all Ages from 



AH 

 Causes. 



Zymotic 

 Diseases. 



257-06 

 256-72 

 239-29 

 235-60 

 198-60 

 202-65 

 205-53 

 209-05 



69-44 

 58-55 

 52-80 

 48-00 

 45-12 

 49-60 

 60-30 

 59-55 



Phthisis. 



29-20 

 31-52 

 34-33 

 35-44 

 30-24 

 29-72 

 23-36 

 24-88 



Bronchitis. 



27-48 

 30-80 

 22-24 

 21-10 

 13-42 

 9-15 

 15-27 

 14-66 



Fkom all Causes at 



0-5 



Years. 



120-37 



118-68 



108-97 



103-43 



88-55 



95-11 



100-13 



99-83 



5-20 

 Years, 



24-12 

 23-06 

 24-42 

 24-40 

 22-84 

 21-02 

 20-77 

 21-82 



20-60 



Years. 



69-21 

 69-26 

 6618 

 67-99 

 55-61 

 54-88 

 52-90 

 54-45 



60, <fea 

 Years- 



43-66 

 45-36 

 39-42 

 39-88 

 31-51 

 31-69 

 31-47 

 32-76 



