200с

1899г

THE PURIFICATION OF SEWAGE

A BRIEF ACCOUNT OF THE SCIENTIFIC PRINCIPLES OF SEWAGE PURIFICATION AND THEIR PRACTICAL APPLICATION

sidney barwise, m.d.(lond.)

M.R.C.S. D.P.H.(Cami;.)

FELLOW OF THE SAN1TAKV INSTITUTE MEDICAL OFFICER OF HEALTH TO THE DERCYilHRE COUNTY COUNCIL

london

CROSBY LOCKWOOD AND SON

/. STATiOXLRV HALL COURT, LUDGATE HILL I 899