1890-91.] A CONSIDERATION OF SEWERAGE SCHEMES. 153 



By applying this formula to Mr. Jennings's Outfall Sewer, which is 

 designed to have a diameter of 8 feet, with a fall of i inch in 1 500, the 

 conditions would be as described in Fig. VIII., small segment. Allowing 

 from 8 to 12 million gallons daily flow, sedimentation would take place 

 very rapidly. 



I did intend going into a minute criticism of the present scheme 

 before the city, but as you are, no doubt, pretty well loaded up with the 

 subject, and as there appears no immediate prospect of putting it or any 

 other scheme into operation for some time to come, I shall, with your 

 permission, reserve it for a future time. 



