470 



MEMOmS OF THE NATIONAL ACADEMY OF SCIENCES. 



Table IV. — licJinoiit dislrict, Lahoratorij of Hi/r/ieiie, lower SclxuijmU water — Continued. 



[Results in parts per 100,000.] 



Date. 



Chlorine. 



Oxygen con- 

 sumed. 



Free ammonia. 



Albuminoid ammonia. 



Nitrogen as 

 nitrates. 



Bacteria in one 

 cubic centimeter. 



1893. 

 Mar. 24. 



31. 



Apr. 7. 



17. 



25. 

 May 5. . 

 15.. 

 23.. 



30.. 



June 13- . 



23.. 



30.. 

 July 17.. 



31.. 

 Average . 



Mean. 



.265 



.255 

 .270 

 .250 



.230 



.290 



.340 



.400 



.495 



.480 

 .590 

 .660 



Mean. 



Tin 



tube. 



.055 

 .050 

 .185 



.105 

 .165 

 .070 

 .050 



.070 



.115 



.075 



.090 

 .090 

 .095 



.0002 



100 CO. 

 deter- 

 mina- 

 tions. 



0. 0035 

 .0015 

 .0010 

 .0010 



.0004 



.0031 



.0020 



.0017 

 .0032 

 .0025 



Glass 

 tube. 



.0001 



.0002 

 .0002 



.0000 

 .0007 



.0007 

 .0011 

 .0000 

 .0000 



.0015 



.0000 



.0000 



.0000 

 .0005 

 .0005 



Mean. 



Tin 

 tube. 



. 0002 i . 0054 



.0016 



.0010 



.0009 

 .0019 

 .0015 



.0134 



.0159 



.0120 

 .0109 

 .0146 



Glass 

 tube. 



.0093 

 .0064 



.0007 

 .0205 



.0106 

 .0228 



.0046 



.0080 



.0113 



.0082 



.0105 

 .0098 

 .0082 



Mean. 



.0060 



.0079 

 .0079 

 .0205 



.0126 

 .0207 

 .0092 

 .0049 



.0074 



.0124 



.0121 



.0113 

 .0104 

 .0114 



.110 

 .110 

 .100 



.070 

 .070 



.080 

 .080 



.060 

 .060 



Mean. 



.050 

 .050 



.050 

 .050 



.070 

 .070 



.070 

 .070 



.090 

 .064 



.070 

 .070 



.070 

 .080 



.090 

 .090 



.070 

 .070 



.060 

 .060 



.080 



.050 



.077 



.070 



.075 



60O 



470 



Mean. 



535 



1,310 ; , ,,,, 

 1,150 <, ''2™ 



560 

 610 



5,320 

 5, 590 



400 |( 

 820 <i 



5.970 7 

 5,900 < 



1,080 'l 

 640 J 



420 

 290 



390 

 340 



250 

 225 



700 

 600 [ 

 860 



580 

 620 



540 

 470 



5, 455 



5,980 



355 



600 



505 



.0022 



.0114 



.079 



■ 3, 745 



