ON THE TREATMENT AND UTILIZATION OF SEWAGE. 49 



two shocks, with an interval of about half a minute. The direction whence 

 the undulation seemed to all the observers to proceed in different parts 

 agreed pretty closely with that indicated by the Seismometer, There was 

 nothing unusual, or in any way remarkable, in the indications of the instru- 

 ments by which the atmospheric phenomena are recorded. The movements, 

 indeed, are more probably connected with the geological relations of the 

 district, and may have no dependence on its meteorology. It is, however, 

 premature to enter on this question in the present state of the inquiry. 

 The Committee is most desirous to be enabled to put up two or three Seis- 

 mometers in other adjacent localities, if any instrument of manageable size 

 can be constructed, and thoroughly capable and trustworthy observers secured. 



Report of the Committee on the " Treatment and Utilization of Setvage," 

 reappointed at Exeter, 1869^ atid cmisistiiig of Richard B. Gran- 

 THAMj M. Inst. C.E., F.G.S., Chairman,M. C. Cooke, M.A., Prof. 

 CoRFiELD, M.A., M.B., J. Bailey Denton, M.I?ist. C.E., F.G.S., 

 John Thornhill Harrison, M. Inst. C.E., William Hope, V.C, 

 Prof. Marshall, F.R.C.S., F.R.S., Benjamin H. Paul, Ph.D., 

 F.C.S., Prof. Wanklyn, Prof. Williamson, Ph.D., F.R.S., and Sir 

 John Lubbock, Bart., M.P., F.R.S., Treasurer. 



[Plates I., II., III.] 



Before describing its operations during the past year, your Committee desires 

 to recall the attention of the Association to the circumstances which led to 

 its reappointment at Exeter last year. 



Your Committee was first constituted at N'orwich in 1868, with a grant of 

 ^10 " to report on the treatment and utilization of Sewage." The resiilts of 

 its inquiries were detailed in the Eeport made to the Exeter Meeting in 

 1869, and the Committee was reappointed with a grant of .£50, being then 

 constituted as follows : — 



Mr. Grantham, Mr. Denton, Mr. Harrison, Mr. Hope, Dr. Paul, and Pro- 

 fessor Wanklyn. 



The Committee as soon as possible made arrangements to proceed with the 

 inquiry entrusted to it ; and one of the first steps taken upon resuming its 

 operations was, in virtue of the power vested in all Committees, to add to 

 its number several gentlemen whose assistance was considered desirable, 

 namely, Mr. Cooke, Professors Corfield, Marshall, and "Williamson, and Sir 

 John Lubbock as Treasurer with respect to the Fund raised by the Committee 

 as hereafter described. 



The Committee proceeded to collect existing information upon the subject 

 of sewage &c. with a view to summarizing it. 



It soon became evident to the Committee that the grant of .£50 from tho 

 British Association would be whoUy insufficient for carrying on the investi- 

 gations in a broad and comprehensive manner. A circular was thereupon 

 prepared and addressed to the authorities of the towns principally inter- 

 ested in the solution of the difficulties in connexion with the disposal of 

 sewage, who it was thought would, if requested, subscribe towards a fund 

 for carrying on the investigations. The draft of this circular was submitted 



1870. E 



