552 
FILTER-PAPER CATCHES, ILLINOIS RIVER. 
All volumes in cubic centimeters. 
a u 3 oe 3 bo ~~ a¢ Bw 
23 2 | BS | 8 | Be | eee | Se | Se de 
o& x Qn = ou | 5 mn oh 2 Om 
O35 Qa es S so |SoOu |] 49 ron gS 
Og a ° 5 Lis eo 2s Ou 
<q HB & ae a2 
1896 
22,366 e | 3, VIII.| 2500 -gI 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 g8.00 | 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 110 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 | 0.18 
22,497 d | 17, XI. 1000 04 40 g6.00 | 38.40 1.60 | 0.02 
22,509 d 3, XII.| 1000 .03 30 g0.00 | 27.00 3.00] 0.58 
22,512 d |! 29, XII 1000 05 50 75.00! 37.50! 12.50 | 0.94 
AVGIA RE ce aie ee EER he 2.66 | 0.64 
1897 
apes) Gl |) 3 UL 1000 -03 30 g0.00 | 27.00 3.00 | 0.03 
22,527 d | 26, Il. 1000 -04 40 g0.00 | 36.00 4.00 | 0.05 
22,533 d | 22, III. 500 .03 60 g0.00 | 54.00 6.00 | 0.38 
22,539 d | 27, IV. | 1000 -O7 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 II 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 13 130 80.00 | 104.00 | 26.00 | 6.40 
22,572 d | 21, VII. | 1000 13 130 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, VII. 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 97.50] 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 |} 119.00} 8.47 
22,608 d | 14, IX. 1000 05 50 82.00 | 41.00 g.00 | 19.80 
22,610 d | 21, IX. 1000 19 190 g0.00 | 171.00 | 19.00} 3.00 
22,612 d | 29, 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 | 19, X. {| 1000 09 go 93-00 | 83.70 6.30 | 1.86 
22,624 d ;26, X. 1000 O4 40 99.00 | 39.60 -40 | 0.20 
22,627 d | 2 XI. | 1000 03 30 99-50 | 29.85 .15 | 0.06 
22,631 d | 9, XI. | 1000 04 40 99-50 | 39.80 .20 | 0.82 
22,634 d | 15, XI. | 1000 05 50 99-50 | 49.75 .25 | 1.86 
22,635 d | 23, 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 99-99 | 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 | 59.94 06 | 0.03 
Average.na.ccismiue bins eae eont On enn eee 12.86 | 3.52 
