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Weekly Analyses of Canal Water as drawn at the Lawrence Experiment Station.

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1891. Aug. 19, 75° Slight. Slight.

26. 77° Slight. Slight. Sept. 2, 70* Slight. Very slight. 9, 68°

Slight. Slight. 16, 68° Very slight. Slight. 23, 72 Very slight. Slight.

30, 72 Very slight. Very slight. Oct.

7, 669 Very slight. Blight.
14, 54° Very slight. Very slight.
21,
55°
None.

Very slight. 28, 489 Very slight. Very slight. Nov. 4,! 45° Very slight. Slight.

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The full results of the weekly analyses of the effluent of Filter Tank No. 8 are given in the following table. The numbers for bacteria given are the regular weekly counts; a more extended account of the numbers and of the various species found will be given subsequently in the report of the biological work of the station.

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City water applied 18 times a week till January 11, 12 times a week January 13 to March 24, and afterwards 6 times a week.

March 18, straw, leaves and other material removed and surface levelled.
Effluent clear and odorless.

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City water applied 6 times a week.
Snow and ice removed from surface December 11, 18, 26, 27 and 30.
Experiments interrupted by high water in the river October 21 and 22.
EMuent clear and odorless.

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City water applied 6 times a week.
Surface raked about 1 inch deep each week, commencing Jan. 1, 1891.
Snow and ice removed from surface January 6, 12, 20, 26, February 9, 16, March 2, 4 and 5.

Experiments interrupted by high water in the river January 25, 26, February 27, 28, March 1, 12 to 29, April 14 to 18.

Eduent clear and odorless.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors]

City water applied 6 times a week to November 12 and afterwards canal water applied 6 times week. Surface raked about 1 inch deep each week.

Emuent clear and odorless.

The following table contains a summary of twenty-five microscopical examinations of the effluent :

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