468 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIE>'CES. 



Table III. — Fairmount districij lotcer Schuylkill, 

 [Results in parts per 100,000.] 



CMorine. 



Oxygen cou- 

 smned. 



Free ammonia. 



Albnrainoid ammonia. 



Xitrogen as 

 nitrates. 



Bacteria in one 

 cnbic centimeter. 



Mean. 



Mean. 



Tin 

 tabe. 



Glass 



tube. 



Mean. 



Tin 

 tube. 



GI>»ss 



Mean. 



-I 



Nov. U.. 



29.. 



Dec. 20.. 

 Jan. 13. 



-I 



Feb. 7-. I 



"i 



20.. { 

 Mar. 10.. { 



0.55 

 .58 



.44 

 .43 



I 



17. 

 24. 





.10 

 .08 



.03 

 .01 



075 



090 I .0000 



I 



035 



.26 

 .26 



.065 



.0002 



Apr. 



-1 



I ] 



^ .245 'j -^ J .065 j .0000 



,,.5 



May 5.. 5 



»■■! 



30.. 5 

 June 13.. J 



23.J 



3D., j 

 July 17.. J 



31..|^ 

 Averase.'... 



.27 |J 

 .24 :J 



.22 1 

 .23 1 

 .24 J 



.25 J 

 .26 i 



.26 |j 

 .24 S 

 .27 > 



.31 } 

 .33 i 



.36 \ 

 .32 J 



.39 



2% 

 230 I 

 255 

 257 



\ m 



{IS- 



100 cc. 



deter- 



, mina- 



tioDS. 



150 I 0.0030 



.07 

 .06 





.320 

 .340 

 .390 

 .480 f 

 .475 





.0055 

 .0018 



.09 I 035 



}.390 I 



.08 



.14 f 

 .16 5 



095 .0025 

 0021 



150 



.09 





■*® I .090 ! 





.0050 

 .0033 

 .0049 

 .0029 



I- 



105 ' .0040 



.0024 

 .(1066 



|0.565 I •:» >.150 |<':S«fg I 0.0029 

 \ -^ll :« I "^j .0029 



«!} -"^ \ :m I -'95! .0039 

 ? { .335 0075 



! I I ■ 



|i.433;J I* J .085 ' .0016 



■M[i-^-^^'i :in-^: \{ 



:i^ } -^l '.ml "^H ••»» 



0.0022 0.0107 I 0.0165 1 0.0136 

 .0029 .0029 



I 



.0056 

 .0019 



. 0101 ; ) 



.0097 5 

 .0039 



.0042 I 



.0010 



.0032 

 .0071 

 .0016 

 .0053 



.0003 



C . 0003 > 

 ( .0007 ; J 



.0002 ; 

 .0000 I 



.0015 

 .0026 

 .0019 



.O.1W 



.0012 

 .0014 

 .0016 

 .0015 

 .0018 

 .0029 

 .0013 



.0121 



.0142 

 .0143 



.0103 



.0155 

 .0103 



.0112 



.0149 

 .0123 



I 



,=, 



.0175 



C ;0107 ' > 

 \ .0104 5 



.0045 

 .0041 



.0118 



I 

 I 



i .0093 



.0010 



i 

 .0002 ! .0068 



.0005 

 .0002 

 .0000 



.0018 

 .0041 

 .0019 



. IXJCIO 



.0019 

 .00)8 

 .0033 

 .0024 

 .0034 

 .0029 

 .0027 



.0075 

 .0087 

 .0089 



.0132 

 .0171 



.0103 

 .0117 



Mean. 



Mean. 



( . 0063 J „^. 



; 0047 5 •"•=" 



.0175 

 . 0106 ' 

 .0097 



.0091 



.0089 

 .0068 



[0.065 

 I .070 



: .110 



.130 



! .130 



; .070 



.080 



I 

 |o.068 } 



12,230 

 9,820 

 9,240 



3.300 

 10.400 

 8,600 



26.500 )<>9 . 

 18. 900 ! J 



4 100 

 2.500 

 1,200 



3,050 

 4.400 



4,300 1 4,300 



, \ 



\:Z 1-0^ { IM'l 

 {:riS:i-"o|{ n\ 



1,950 



3,725 



{ -.z I •« 



1. 



2,550 



2,925 

 5. 675 



4,800 



800 

 050 



3,370 

 2,660 



1,290 

 1.730 



3,610 

 3.000 

 6,370 



2,213 



I 3,015 

 \ 1,510 



.0118 

 .0144 



C .050 > 

 \ . 050 : J 



< .060 I 

 \ .050 5 



« .060 ' ) 



I .oeo i 



( .070 ) 



* 070 S 



( .058 ; 

 ( .058 ,5 



C . 050 ' ) 

 { .050 5 



5 .066 ) 

 I .066 J 



f .070 ( 

 i .070 i 



S ■«'<> i 

 ( .070 5 



( .060 t 

 i .060 5 



{ .060' ) 

 i .060 S 



050 

 055 



1.160 

 2,000 



5.930 , 5,930 



I 5S0 



\ 350 



I 1,055 



I 

 } 



.070 I 

 .060 f 

 .060 ... 



430 

 760 

 870 

 390 



90 > 



120 J 



590 

 920 



• W!28 



.0108 



