LXII T. W. SEAVER. 



as a protection to canal banks close to the scour caused by 

 a regulating gate, where it showed no signs of leaking. 



Tarred cloth has been used in America where it was 

 found that with 12 oz. duck there was no seepage, even 

 under conditions in which the banks would otherwise seep 

 out as through a sieve. Good results may also be obtained 

 by carting clay or silt into the head of the channel, and 

 keeping it well stirred up till it forms a film over the 

 bottom and sides. 



