FOREWORD 



this chapter being in substance a paper prepared by 

 me for the Association of Cleansing Superintendents of 

 Great Britain and Ireland which met in London in 

 1908. 



It was once my hope that a study of street cleaning 

 methods in different cities would enable me to deduce 

 some principles of general application, especially as to 

 efficiency and cost, but the nature of the work and the 

 character of the information available does not admit 

 of many precise deductions of this kind. Numberless 

 conditions of pavement, of traffic and of weather, not 

 to mention different sanitary standards, make it im- 

 possible to treat this subject in the severely analytical 

 method common in engineering discussions. 



G. A. SOPER 



NEW YORK, 



June, 1909 



IV 



