ON THE TREATMENT AND UTILIZATION OF SEWAGE. 



183 



the Committee viewed the land), is not clear to the eye nor sufficiently- 

 pure to be admitted into rivers, there must be times when it may become 

 exceedingly objectionable. 



It is to be remarked in this case, moreover, that there was (on July 

 loth, 1871) more liquid passing off the land at the outfall than there 

 was sewage delivered to it for apphcation, due possibly to the passage of 

 the recent rainfall through the porous soil of the higher part of the farm. 

 This fact would, in the absence of the analyses of Dr. liusseU, have led 

 to the conclusion that the effluent liquid was purer than usual. 



Observations on the Analyses of Sewage and Effluent Wafer from the ■ 

 Red Hill and Reigate Sewage-Farm. 



In 100,000 parts. Samples taken 14th and 15th July, 1871, in the pro- 

 portion of YuTj-f, part of the flow. 



Solid matter. 



In solution. 



Dried at] 

 100° C. 



Sewage at the 

 point where 

 it enters the 

 extractor. 

 Average ilow 

 130 gallons 

 per minute 

 (tempera- 

 ture 5S° F.)!/ 



Sewage after 

 passing 

 through the 

 extractor 

 and before 

 application 

 to land 

 (temi>era- 

 ture 58° F.) 



Effluent water 

 taken in 

 twelve por- 

 tions every 

 tw<^ hours, 

 after it had 

 passed over 

 one field of 

 rye-grass 

 (tempera- 

 ture ba°-5 F. 



Effluent water 

 taken in ten 

 portions at 

 the outfall, 

 after it had 

 passed over 

 two fields of 

 rye-grass 

 Average flow 

 V52 gallons 

 per minute 

 (tempera- 

 ture 63' F.) 



.34-60 



1-33-00 



!- 29-40 



!- 35-80 



After 

 igni- 

 tion. 



1800 



17-50 



17-80 



In suspension. 



Dried at 

 120° C. 



After 

 igni- 

 tion. 



Chlo- 

 rine. 



6-40 



4-lG 



24-20 



I-92 



204 



6-18 



6-04 



4-40 



4-8G 



Ammonia. 



In solution. 



Actual. 



■76 



1-32 



0-02 



Albu- 

 minoid. 



012 



0-14 



0-06 



010 



In suspended 

 matter. 



Actual. 



000 



000 



Albu- 

 minoid. 



0-12 



009 



Nitro- 

 gen as 

 nitrates 



and 

 nitrites. 



0-08 



007 



Total nitrogen. 



In solu- 

 tion 



i-91 



1-55 



1-2S 



In sus- 

 pended 

 mattery 



003 



This is decidedly a weak sewage, as it does not contain one third of the 

 quantity of " actual " ammonia, nor one fourth of that of " albuminoid " 

 ammonia that the samples of Tunbridge WeUs (North Farm) contain ; the 



