552 



FILTER-PAPER CATCHES, ILLINOIS RIVER. 



All volumes in cubic centimeters. 



If) 







d 



A 







Jt<°. 





.2 S 



w £1 

 w G 



1) □ 

 O 3 

 u C 

 < 



TO 



Q 



Water 

 strained 



re 

 U 



O 



° CO 



3 8 



, — 1 ;-. 



H 



Estimate 

 percentag 

 of silt 



■*-> <D 



cx£ 



— Cu 



H2 



^ d 



ro — 



u M 





1896 

















22,366 e 



3, VIII. 



2500 



01 



364 



99.50 



362.18 



1.82 



0.26 



22,376 d 



8, VIII. 



1000 



08 



80 



99.00 



79.20 



.80 



2.60 



22,430 d 



15, VIII. 



1000 



16 



160 



99.00 



158.40 



1.60 



1. 16 



22,436 d 



21, VIII. 



1000 



22 



220 



98.00 



215.60 



4.40 



0.28 



22,455 d 



26, VIII. 



1000 



13 



130 



99.00 



128.70 



1.30 



0.43 



22,464 d 



29, VIII. 



1000 



08 



80 



98.50 



78.80 



1.20 



0.50 



22,466 d 



16, IX. 



1000 



II 



no 



98.00 



107.20 



2.20 



0.53 



22,473 d 



30, IX. 



1000 



07 



70 



99.00 



69.30 



.70 



0.23 



22,481 d 



14, X. 



1000 



08 



80 



99.00 



79.20 



.80 



0.1S 



22,497 d 



17, XL 



1000 



04 



40 



96.00 



38.40 



1 .60 



0.02 



22,509 d 



3, XII. 



1000 



03 



30 



90.00 



27.00 



3.00 



0.58 



22,512 d 



29, XII. 



1000 



05 



50 



75.00 



37-5° 



12.50 

 2.66 



0.94 







Average . . . 





0.64 

















1 



897 

















22,518 d 



3, 



II. 



1000 



03 



30 



90.00 



27.00 



3.00 



0.03 



22,527 d 



26, 



II. 



1000 



04 



40 



90.00 



36.00 



4.00 



0.05 



22,533 d 



22, 



III. 



500 



03 



60 



90.00 



54.00 



6.00 



0.38 



22,539 d 



27. 



IV. 



1000 



07 



70 



80.00 



56.00 



14.00 



5. 11 



22,552 d 



25, 



V. 



1000 



08 



80 



88.00 



70.40 



17.60 



5.62 



22,561 d 



28, 



VI. 



500 



n 



220 



99.00 



217.80 



2.20 



0.27 



22,564 d 



14, 



VII. 



1000 



08 



80 



75.00 



60.00 



20.00 



8.16 



22,564 e 



16, 



VII. 



1000 



13 



I30 



80.00 



104.00 



26.00 



6.40 



22,572 d 



21, 



VII. 



1000 



n 



130 



96.00 



124.80 



5.20 



0.92 



22,580 d 



30, 



VII. 



1000 



06 



60 



96.00 



57.60 



2.40 



1.05 



22,588 d 



10, 



VIII. 



1000 



05 



50 



96.00 



48.00 



2.00 



2.02 



22,592 d 



17. 



VIII. 



1000 



04 



40 



96.00 



38.40 



1 .60 



1.98 



22,595 d 



24, 



VIII. 



1000 



06 



60 



07. 50 



58.50 



1.50 



2.77 



22,601 d 



31, 



VIII. 



1000 



20 



200 



75.00 



150.00 



50.00 



9-45 



22,603 d 



7. 



IX. 



1000 



34 



340 



65.00 



221.00 



1 19 . 00 



8.47 



22,608 d 



14, 



IX. 



1000 



05 



50 



82.00 



41.00 



9.00 



19.80 



22,610 d 



21, 



IX. 



1000 



iq 



I90 



90.00 



171 .00 



19.00 



3.00 



22,612 d 



2Q, 



IX. 



1000 



14 



140 



80.00 



112.00 



28.00 



4.04 



22,618 d 



5. 



X. 



1000 



18 



180 



75.00 



135.00 



45.00 



12.92 



22,619 d 



12, 



X. 



1000 



05 



50 



95.00 



47-50 



2.50 



5-17 



22,622 d 



IQ, 



X. 



1000 



09 



90 



93.00 



83.70 



6.30 



1.86 



22,624 d 



26, 



X. 



1000 



04 



40 



99.00 



39.60 



.40 



0.20 



22,627 d 



2 



XI. 



1000 



03 



30 



99.50 



29.85 



•i5 



0.06 



22,631 d 



q, 



XI. 



1000 



04 



40 



99-5° 



39.80 



.20 



0.82 



22,634 d 



IS, 



XI. 



1000 



05 



So 



99.50 



49-75 



■25 



1.86 



22,635 d 



2.3. 



XI. 



1000 



03 



30 



99.20 



29.76 



.24 



1 .01 



22,638 c 



30, 



XI. 



1000 



07 



70 



99.90 



69.93 



.07 



1.27 



22,643 c 



7, 



XII. 



1000 



02 



20 



99.90 



19.98 



.02 



0.70 



22,644 c 



21, 



XII. 



1000 



02 



20 



99.90 



19.98 



.02 



0.30 



22,647 d 



28, 



XII. 



1000 



06 



60 



99.90 



5q-94 



.06 



0.03 









Average . . . 





12.86 



3-52 















