Montreal Drinking Water. 



175 



to neutralize the accidental advantage of the earlier over 

 the later months. By this method alone can the four 

 weekly determinations of March be made equal to the 

 fifteen daily ones of November, as they should. The grand 

 average corrected in accordance with this idea is given in 

 the Table of Monthly Averages, which, with a Table of 

 Daily Results, is hereto appended. 



Table of Monthly Averages. 



Months. 



Degrees of 

 Hardness. 

 Wanklyn. 



4.70 

 5.12 

 3.77 

 4.72 

 6.07 



Chlorine. 

 Grs. per gal 



Total Solids. 

 Grs . per gal . 



Free 

 Ammonia. 

 Per million . 



Albuminoid 

 Ammonia. 

 Per million . 



November 

 December . 

 January .. 

 February . 

 March 



0.264 

 0.243 

 0.235 



0.277 

 0.325 



6.83 

 6.70 

 5.23 

 7.12 



8.82 



Not det. 



it 



0.0028 

 0.0040 



0.00288 



Not det. 



u 



0.0250 

 0.0172 

 0.0155 



Average. 



4.876 



0.269 



6.94 



0.00322 



0.0192 



TABLE OF ANALYSES OF MONTREAL WATER MADE BETWEEN 

 NOV. 1st, 1885, AND APRIL 1st, 1886. 



Day. 



Date. 



Hardness 

 Wanklyn. 



Chlorine. 

 Grs. per gal. 



Residue . 

 Grs. per gal. 



Free H 3 N. 

 Per million. 



Alb. H S N. 

 Permill'n. 



Monday . . . 

 Tuesday . ■ . 

 Wedn'sday. 

 Thursday . . 



Nov. 2 

 3 

 1 

 5 



4.66 

 5.5 



4.8 

 4 8 



40 

 25 

 40 



7.1 

 7.3 



Not deter 



mined. 



Monday . • • 

 Tuesday . . . 

 Wedn'sday. 



Nov. 9 



" 10 

 " 11 



i.8 

 ~ 4.75 

 4.63 



25 7.1 



27 7.7 

 25 7.1 



i< 1 <. 



i 



Monday . . . 

 Tuesday • . . 

 Wedn'sday. 

 Thursday . . 



Nov. 16 

 " 17 

 " 18 

 " 19 



4.7 

 4.8 

 4.b5 

 4.5 



25 6.5 

 20 6.6 

 30 6-1 

 30 



" ! " 



Monday . . . 

 Wedn'sday. 

 Thursday .• 



Nov. 23 

 " 25 

 "' 26 



4.5 

 4.5 

 45 



175 6.9 

 20 6.9 

 25 6.3 



Monday . . . 

 Tuesday • . . 

 Wedn'sday. 



Nov. 30 4.5 

 Dec. 1 4.5 



" 2 4.5 



i'O 6.4 

 25 6.3 



20 6.4 



Monday . 

 Tuesday '. . . 

 Wedn'sday. 

 Thursday . . 



Dec- 7 



8 



" 9 



" 10 



5.8 

 5-7 

 6.1 

 4.6 



20 

 25 

 25 

 35 



6.4 

 7.0 

 6.9 

 6.9 



it 



