F 



DISTRIBUTION AND DISTRIBUTORS 



293 



so as to cover as much of the surface as possible. From a 

 minimum of 2 ft. 9 in., with a discharge of 10 gals, per min.,. 

 to a maximum head of 5 ft. and a discharge of I3'5 gals., it is 

 expected that ']']y^ of the area will be covered in a satisfactory 

 manner. The two arms which hold the inverted cone on the 

 nozzle will be ground down to sharp edges in a vertical radial 

 plane; "in consequence the sheet of liquid after passing heels 

 up so that trouble from these obstructions is eliminated." 

 Figs. 41, 42 show the nozzle and its arrangement on the 



Fig. 41.— Sprinkler Nozzle, Columbus, Ohio. 



. Surface of FiltPr^ Sprinkler XoztI*. . . 



pg^ S?3K^fess»*|] -fl f*— ^ — " ^ 



Fig. 42. — Section of Bed, Columbus, Ohio. 



filter bed. For flushing and other purposes a lo-in. water main 

 has been run to the works, and to maintain " an uniform dis- 

 tribution at the nozzles and to keep the consequential losses 

 low in the main collectors it has been necessary to use depositing 

 velocities." 



A similar nozzle distribution is a part of the works authorized 

 for the city of Baltimore, Md., and a description and drawings 

 of the whole scheme, and of a testing plant, with several valuable 

 comments, are given in the Report of the Advisory Engineers 

 (Hering, Gray, and Stearns), May 31, igo6. 



