ON THE TREATMENT AND UTILIZATION OF SEWAGE. 



167 



atmosphere, was observed. Similar observations -vvere madie at Croydon and 

 Norwood (see Section I.). 



The observations as to the quantity and quality of the sewage and effluent 

 water have been continued at Breton's Parm, with slight interruptions, as 

 stated above, from the Meeting of the British Association at Liverpool down 

 to the present time. The results of the gaugings are recorded in the Tables 

 which will be found in Section II. of this Eeport. 



The Committee has visited several sewage-farms, and examined the various 

 methods that are pursued at them with a view to determining the practical 

 conditions upon which the success of sewage-farming depends. They have 

 had samples of sewage and of effluent water collected, and have had analyses 

 made of them, which latter, with the remarks of the Committee, wiU be found 

 in Section III. 



The phosphate process of Messrs. Forbes and Price has been also examined 

 by a Member of the Committee, and a description of the process, with an 

 analysis of the effluent water from this process, is given in Section IV. 



Analyses of the soil which has passed once and twice through earth-closets 

 have been furnished by another Member ; and the manner in which this 

 process is carried out at Lancaster, with the results attained there, is de- 

 scribed in Section V. 



An ox which had been fed for the previous 22 months entirely on sewage- 

 grown produce was slaughtered on July 15th at Breton's Farm, and the carcass 

 examined by Dr. Cobbold and Professors Marshall and Corfield, in the presence 

 of several Members of the Committee, with a view to ascertain the presence or 

 absence of Entozoa in any stage of their existence. The results of this exami- 

 nation, and Dr. Cobbold's report, will be found appended (Appendix B). 



The attention of the Conimittee has been drawn to certain anomalies in 

 the figures given in the list of rainfalls in the " Tabulation compiled from 

 returns furnished by 200 towns .selected for classification," at the end of last 

 year's Report. - • • 



On referring to the original returns, it has been found that the figures 

 given in the Table are correctly taken from them. 



Section I. — A Comparison of Results obtained in the purification of Sewage at 

 three Irrigation Farms during the severe frost of last winter. 



1. Breton's Farm, near Romford. 

 The following analyses show the composition of average samples of sewage 

 and effluent water collected on the farm on January 2nd ; each sample was 

 made by collecting five portions at different times, and mixing them in pro- 

 portion to the flow at the time. 



