196 



THE CANADIAN NATURALIST. 



[June 



unhealthy. The principal causes of the dcatli-rate, therefore, 

 must be looked-for in the condition of the dwellings. 



But, as it is shewn that the special mortality of the city 

 follows the months, not indeed for adults, but for children, let us 

 examine whether it specially follows any particular period of 

 childhood. 



22. Deaths of Children in Montreal, 1867, according to 

 acres and months. 



Under i year. 



Total, "^^^'^^y 

 average. 



From I to 5 yrs. 



From s to 12 yrs. 



Total. Weekly 

 average. 



All ages under 12. 



Total. Wfj^'y 



January . . 

 February . 

 March . . . 



April 



May 



June 



July 



August . . 

 September 

 October . . 

 November 

 December 



Total... 



404 

 3.59 

 157 



31-5 

 33-7 



45-8 



39-2 

 237 

 25.2 

 19.0 



I0.6 

 15 5 



223 



.362 

 578 

 547 

 277 



40-5 

 43-5 

 47.6 

 40.2 

 44-7 

 72.4 



144- S 



109.4 

 69.2 

 36.7 

 35-° 



28.4 



The numbers are so few in the third column that they cannot 

 be relied on for averages in a single year ; but the very slight 

 increase of June and July over the early months of the year 

 is very noteworthy, lu the second column, while the July death- 

 rate is three times that of Februar}', in the first column it is 

 is nearly four times. It would appear, therefore, that the 

 summer influences aifect but slightly children above 5 ; and, most 

 of all, those under 1 year, A single average year of life in each 

 of the columns gives the following death-rate for an average 

 week: — 



