322 The Wohurn Pot-Culture Ea'periments, 1914. 



clearly show that there is scmiefhing effected by the peat, and 

 that this is due not to the chemical composition alone of the 

 same. What this something may be must be the work of 

 future investigation. 



V. Sewage Sludge Experiments. 



In 1914 an extended series of experiments was carried out 

 at Woburn on behalf of the Royal Commission on Sewage 

 Disposal. This concerned principally the trial of sludge 

 prepared by a new process which aimed at remoYing the 

 grease, thereby enhancing, as was hoped, the value of the 

 sludge as manure. The account of these experiments will be 

 published in the Appendix to the Report of the Royal Com- 

 mission, and the work is accordingly not dealt with here. It 

 is sufficient to say that the experiments failed to show the 

 " degreased " sludge to be improved in value, for the natural 

 sludge in every instance proved to be the better. 



J. Augustus Yoelcker. 



1 Tudor Street, E.G. 



