AprnEY—On Absorption of Oxygen by Polluted Waters, &e. 287 
Experiments with this apparatus have shown it to be capable 
of yielding accurate and extremely important results with a 
minimum expenditure of time and labour. The author hopes 
shortly to publish in a further communication some important 
results which he has already obtained by its means. 
It may be well perhaps to state in conclusion that a Report on 
the “Pollution of Estuaries and Tidal Waters,” by Professor 
Letts and the author, will very shortly be issued by the Royal 
Commission on Sewage Disposal, in which the most important 
work on the subject of the absorption of atmospheric oxygen by 
polluted waters has been recorded and discussed. 
SCIENT. PROC. R.D.S,, VOL. KI., NO. XXV. 2Q 
