1900.] 



and the distribution of Anopheles Mosquitos. 



463 



there being no sluice gate where it passes through the bund, while part of 

 the bouses of the Municipality are surrounded by rice fields. The water- 

 level in a well in Ward I. was 8 ft. 9 in. below the surface in February 

 while during the previous rainy season it had risen within 9 inches of the 

 ground, when -he water could be dipped out by hand without the use 

 of any rope, so that there is no doubt about this Municipality being 

 very water-logged. 



TABLE IV. 

 South Dum Dum. 



Ward. 



Ground 

 Water-Level. 

 Feb., Rains, 

 1900. 1899. 



Water-supply. 



Corrected 

 Spleen percentages. 

 Adult Children. General 

 Males. Total. 



I. (7) 



8 ft. 9 in. 1 ft. 



Tank. 



41-8 48-8 45-3 



,11. (8) 



... 



do. 



354 40-4 37-9 



III. (9) 



... 



Partly filtered. 



11*8 156 13-7 



Baranagar. — This Municip 



ality lies between the Hooghly and the 



Eastern Bengal Railway, extending northwards for nearly two miles 

 above Cossipore. It is divided into four Wards, the first three of which 

 are between the river and the Grand Trunk Road, and the fourth lies to 

 the east of the former, being mostly between the Grand Trunk Road 

 and the railway, and consequently is dependant for its water-supply on 

 tanks, while the first three get theirs mainly from the river, although 

 Ward I., which is the most southernly bordering on Cossipore, obtains a 

 certain amount of filtered water from that Municipality. Ward I. 

 has the lowest spleen-rate, it being only 11*6, Wards II. and III. have 

 intermediate rates of 143 and 18*1 respectively, while Ward IV. has the 

 highest rate, namely, 26 ; differences which can only be explained by 

 the varying water-supply, for although the last Ward also has a larger 

 area under rice cultivation, that portion of it, whose inhabitants were 

 examined, did not present materially different conditions from the other 

 three Wards. Nor will the differences in the ground water-level, which 

 are given in the Table below, account for those of the spleen-rates. 



TABLE V. 



Baranagar. 



Ward. 



Ground 



Water-Level. 



Feb., Rains, 



1900. 1899. 



Water-supply. 



Spl< 

 Adult 

 Males. 



Corrected 

 3en percentages. 

 Children. General 

 Total. 



I. (10) 



7 ft. 7 in. 



4 ft. 



River and Tank 

 & some filtered. 



150 



8-3 



11-6 



11.(11) 



4 ft. 1 in. 



2 ft. 



River and Tank. 



12-3 



163 



143 



IIL (12) 



7 ft. 6 in. 



3 ft. 



do. do. 



22-9 



13-4 



181 



IV.' (13) 



... 



... 



Tank only. 



14-6 



37-3 



26-0. 



