... TREATMENT ODOURS CONTROL FILTERS THE LATERAL PRESSURE ON CLAY SAMPLES. 499 square inch or more could be measured, and, for the type of soil tested a t Singapore, that was considered a distinct advantage. Mr. Hunter hoped thatthe Authors would publish the results of further testsmade...

... of composite materials. A double difficulty arises in sewage-purification, inasmuch as thenecessary work has to be carried out without causing offence to theratepayer s nose or pocket : but in actual fact, uthrgeent necessity of developing better methods of odour-control has resulted in lower operation costs...