MEMOIES OP THE NATIONAL ACADEMY OF SCIENCES, 



473 



Date. 



1892. 

 Sept. 27 



Chlorine. Mean, 



Oct. 1 



19 



5 obs. 

 0.70 



.60 

 .64 

 .62 



.65 



.6; 



.59 



.06 1 

 .116 S 

 .71 ) 



.73 

 .71 

 .68 



.68 

 .58 

 .63 



.66 

 .05 

 .69 



.66 ) 

 .63 l. 

 .05 S 



.67 

 .70 

 .68 



.68 

 .61 

 .64 



.68 

 .73 

 .65 



.65 

 .65 

 .67 



. 57 

 .62 

 .65 



.68 

 .71 

 .69 



.60 

 .64 

 .64 



.71 

 .71 

 .67 



.73 

 .73 

 .72 

 .67 

 .70 



.66 



0.770 

 .730. 



.620 



.017 



.677 



.707 



.713 



.683 



.68 

 .66 

 .63 



.70 

 .06 

 .62 



.63 

 .61 

 .60 



.67 

 .62 

 .60 



.64 

 .61 

 .59 



.65 

 .64 

 .63 

 .69 1 

 .67 ^ 

 .60 ) 



.647 



Date 



T.MiLE YII. — Chlorine, luhoraturij tap. 

 [Parts per 100,000.] 



Date. Chlorine. Hean. 



1892. 

 Oct. 26 



.087 



.613 



.697 



.710 



.673 

 .657 

 .660 

 .613 

 .630 

 .613 

 .640 

 .653 



Chlorine. Hcan 



.66 ) 



■62 iS 

 .62 p 



f .63 1 



Xov. 1 



\ IS 



•ii 



■■1 



63 

 03 : 



58 I 



.66 

 .64 



.70 



.67 

 .66 

 .70 



.66 

 .67 

 .66 



.70 







.68 



70 

 70 

 71 



.67 1 

 .69 1 S 



.71 I i 



.87 ) 

 .69 ^ 



.71 I J 



.69 I 1 

 . 70 > 

 .71 > 



.71'. 



M 



.71 1^ 

 .71 !i 



.71 

 .73 

 .75 



.66 

 .65 

 .63 



.66 

 .64 



.63 



.68 

 .67 

 .70 



0.61 

 .65 



.60 

 .60 



.59 



.54 



.55 

 .52 



.57 

 .54 



.54 

 .53 



.48 

 .49 



.43 



.42 



.40 

 .42 

 .46 

 .45 

 .44 

 .42 

 .38 

 .85 

 .37 

 .40 

 .43 

 .38 

 .43 

 .38 



.677 



.703 



.700 



.643 



.683 



0.630 

 .600 

 .505 

 .535 

 .555 

 . 535 

 .485 

 .425 

 .493 

 .410 

 .455 

 .430 

 .365 

 .385 

 .405 

 .405 



1892. 

 Nov. 28 \ 



29 



30 



Dec. 1 



2 



3 



4 

 5 



1893. 

 Jan. fi 



.40 ) 

 .41 i 



.38 

 .39 



.45 

 .39 



.38 

 .42 



.40 

 .47 



.43 

 .42 



.40 

 .41 



.46 

 .42 



.42 

 .44 



.41 



.41 



.41 



.47 



.40 

 .39 



.42 

 .44 



.39 

 .41 



.37 

 .38 



.37 

 .40 



.37 

 .39 



.38 

 .38 



.35 

 .36 



.37 

 .35 



.32 

 .34 



.37 

 .33 



.31 

 .34 



.35 

 .34 



.33 

 .34 



.37 

 .33 



.30 

 .31 



.34 

 .34 



.28 

 .■30 



.28 

 .31 

 .29 

 .33 

 .3* 

 ..■M 

 .32 

 .32 

 .32 

 .32 

 .31 

 .36 

 .31 

 .31 

 .31 

 .33 

 .32 

 .33 

 .34 



. 4u5 

 .385 

 .420 

 .400 

 .435 

 .425 

 .405 

 .440 

 .430 

 .410 

 .440 

 . 4.55 

 .395 

 .430 

 .400 

 .375 

 .385 

 .380 

 .380 

 .355 

 .360 

 .330 

 .350 

 .325 

 .345 

 .335 



.350 

 .305 

 .340 

 .290 

 .295 

 .310 



.333 

 .320 



.315 

 .335 

 310 

 .325 

 .335 



Date. Chlorine. Mean 



1893. 

 Jan. 20 



22 



23 



24 



25 



26 



27 



28 



29 



30 



31 



Feb. 1 



2 



3 



4 



5 



G 



7 



36 j 



28 I 



.35 

 .35 



.35 

 .36 



.37 



.38 



..39 

 .38 



.37 

 .39 



.37 

 .36 



.37 

 .39 



.35 

 .33 



.36 

 .34 



.32 



.35 



.30 

 .30 



.31 

 .31 



.28 

 .31 



.27 

 .26 



.24 



.25 



.24 



.26 

 .27 



.26 

 .22 



.23 

 .27 



.22 

 .24 

 .23 



.24 



.22 



.24 



.21 



.24 



.25 



.23 



.20 



.23 



.20 



.24 



.20 



.16 



.22 



.26 



.20 



.21 



.25 



.29 



.26 



.26 



.29 



.25 



.30 1 ( 



.31 J 



.29 ) 



.31 5 



.25i) 



.343 



.350 

 .340 

 .345 

 .350 

 .355 

 .375 

 .385 

 .380 

 .365 

 .380 

 .340 

 .350 

 .335 

 .320 

 .310 

 .295 

 .265 

 .245 



.257 



.240 

 .250 

 .230 

 .235 

 .230 

 .225 

 .240 

 .215 

 .220 

 .180 

 .240 

 .205 

 .270 

 .260 

 .270 

 .305 

 300 



.257 



