1894.] MICROSCOPICAL JOURNAL. 251 



P. T. Cleve, Paris. 14 



G. C. Wallich, London. 13 



Dr. F. Colin, Breslau. 13 



Dr. J. F. Weiss, St, Petersburg. 13 



G. A. W. Arnot, London. 13 



J. Brun, Brussels. 13 



Hon. J. D Cox, Cincinnati, Ohio. 12 



L. Dipple, Germany. 12 



J. J. Woodward, Washington. 12 



C. H. Kain, Camden, N. J. 11 



G. Schaarschmidt Jstvanffi, Klausenberg, 11 



NEW PUBLICATIONS. 



Sewage Di'iposal in the United States. — By George W. Rafter, 

 and M. N. Baker., New York. D. Van Nostrand Co. S6.00. 

 2nd edition ; pp. 598, 102 figures. 



Among the gigantic problems of city life is that of sewage 

 disposal. The sciences of Engineering, Chemistry and Biology 

 are called upon to do their utmost in this direction. The liter- 

 ature of the subject is alread}- voluminous and will constant!}' 

 increase, but nowhere will be found a more valuable contribu- 

 tion than that under notice. Its distinguishing novelty and 

 its feature of most interest to us, is the study of minute or- 

 ganic life with the microscope with application to the se^'age 

 problem. ^' 



We now know beyond peradventure that the germs of 

 Typhoid , Cholera, Dysentery and Diarrhcea get into sewage 

 and therefrom pass at times to drinking water to be again ad- 

 mitted to the system with deadly effect. How to prevent this 

 cause of epidemics is a problem treated by this volume, but 

 we cannot take space to go into details. A full and absorbing 

 history of many epidemics is given with the causes clearl}' 

 traced. 



Some microscopic forms of a vegetable character are injuri- 

 ous to drinking water, while some others have a purifying ef- 

 fect upon sewage laden streams. To the inquirer as to the 

 utility of microscoi)ical study, a very satisfactory answer can 

 be made under this heading. Attention may be directed to the 

 chapter on: "Self-purification of a running stream from a bio- 



