624 Meeting of the British Association. [Oct., 



President remarked that bis own idea was that the electrical system 

 was the only one which would work satisfactorily. 



Mr. E. Froude read a paper, in which he detailed some cmious 

 and successful efforts to clean the internal surface of the Torquay 

 water-main, an u'on pipe fourteen miles long. In the year 1864 

 the delivery of water from the main was reduced to 320 gallons 

 per minute, or only about one-half the amount due to the size and 

 fall of the pipe. After trying several expedients for scraping off 

 the oxidized material in the pipe by liydraulic pressure, Mr. Froude 

 was able, in April of this year, to increase the discharge to 660 gal- 

 lons per minute. To keep the pipe in a satisfactory condition it is 

 necessary to scrape it at least once a-year. The cost of scraping 

 is very trifling, and the whole fourteen miles can be done at one 

 time. 



In concluding this brief notice of the proceedings in the 

 Mechanical Section, we are bound to admit that a fair amount of 

 interesting work was done ; but when we have said this we have 

 almost said all. Of this we feel assm-ed, that the British Associa- 

 tion Meeting of 1869 will not be marked in the calendar with a 

 " red letter " in so far as mechanical science is concerned. The 

 meeting of 1870 in Liverpool ought to bring forth something that 

 wiU be much more worthy of being put on record. 



