480 DOROTHY F. PETTIBONE, F. B. BOGART AND P. F. CLARK 



2. The city water supply was at the time, and has been, excel- 

 lent in its sanitary character. It is obtained from the underlying 

 Potsdam sandstone. No streptococci were found on a Berkefeld 

 filter through which water had been flowing continuously for one 

 week. 



3. Presumably the bubble fountains were a factor in trans- 

 mitting the disease. 



4. A survey of all the fountains of the University showed the 

 presence of streptococci in over 50 per cent of the total number. 

 The streptococci varied in abundance from a few chains to an 

 almost pure culture obtained by swabbings from the fountains 

 in the women's dormitory. 



5. In an experimental bubble fountain, B. prodigiosus when 

 introduced either by means of a pipette or by the moistened lips 

 remained in the water from 2 to 135 minutes depending partly 

 on the height of the "bubble." 



6. Most of the organisms are flushed away but some remain 

 dancing in the column much as a ball dances on the garden foun- 

 tain even though the bubble be increased to the impractical 

 height of 4 inches. 



7. To avoid the difficulty always present in the vertical col- 

 umn, a simple fountain with a tube at an angle of 50 degrees from 

 the vertical was constructed. B. prodigiosus was never found 

 in the plates from this type of fountain even when samples were 

 taken immediately after the introduction of the organisms. 



8. We believe that this type of fountain should be generally 

 adopted. Its simplicity, low cost of construction and freedom 

 from lurking danger should recommend it to all. 



