DISTRIBUTION AND DISTRIBUTORS 



283 



Chap. XIII.) working with a difference of level of about an inch. 

 The arrangement consists of a module chamber having a circular 

 opening in the bottom ; through this opening is a body, conoidal 

 in shape, attached to a float. As a head of liquid falls, so do the 

 float and cone, making the opening larger, and vice versa. 



Distributors. 



A. In the intermittent or ^'holding up " system the sewage has 

 to be applied at intervals to a number of beds. The chief auto- 

 matic apparatus for this purpose are the following : 





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SECT/ON 



Fig. 31. — Section of Intermittent Supply by Adams' Syphon. 



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Fig. 32. — Plan of Intermittent Supply by Adams' Syphon. 



I. Adams' Syphon (Adams' Hydraulics Limited, York), also 

 adapted to the continuous systems. In the intermittent form 

 (Figs. 31, 32) A is the inlet, B a scum or resolving tank, C a 

 syphon feeding the first bed, coupled by air pipes with the 

 domes E and F. The sluice supplying the second bed is closed 

 while the first is filling from the feed C through the distributor G. 



The feed apparatus is a plain trap-like casting through which 

 liquid passes freely from the source of supply to the bed to be 



