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satisfactory, whereas as regards tlie disconnected trap system 

 there is no experience to warrant its utility. He thought the 

 pneumatic suction method was also a very satisfactory one. 

 He would recommend that both be tried. 



Mr. Black, C.E., agreed with Mr. Eutt as to the effect of 

 the difference between the different street levels. He pointed 

 out that Mr. Haslam's plan necessitated two ventilating pipes. 

 The objection to the disconnected traps was that they collected 

 refuse. He thought smells were often very useful in drawing 

 attention to defects or accumulations of sewage, and that they 

 were not in themselves necessarily injurious. 



Mr. Magaret, M.B., thought that the hot weather was not 

 the most unhealthy period of the year, notwithstanding that it 

 might interfere with the ventilation of the sewers. It is 

 impossible to say yet what effect the deep drainage will have 

 on the public health, owing to the very imperfect system exist- 

 ing of allowing it to be optional whether a house should be 

 connected or not. To make the drainage system of any use, 

 connection should be compulsory. At present typhoid fever 

 was quite as prevalent in the suburbs as in the city, and it 

 seemed to be worse as one got nearer the hills. In fact, it was 

 all over the country. He thought that there was a great deal 

 of unnecessary alarm in the public mind respecting the deep 

 drainage and the public health. 



Hon. Allan Campbell differed from Mr. Magarey. He 

 thought that the first cases of typhoid fever were in January. 

 He suggested that Mr. Magarey should give the Society a 

 paper on the origin of typhoid fever. He agreed with Mr. 

 Parker as to the desirability of having more accurate data at 

 command; but he could not see how they would affect the 

 action of a natural law, such as that a heavier stratum of air 

 could not lie above a lighter one, without there being a ten- 

 dency for a mutual displacement taking place. With respect 

 to the sewer air falling down from the ventilating pipe, he 

 thought the chances were quite as great of its rising to the 

 bed-room windows from the street-gratings. He would insist 

 again upon the absolute necessity for there being a proper 

 system of thorough ventilation in the drains ; there should be 

 no smells, and decomposition should be impossible. 



Hon. Gr. W. Cotton asked if there were sufficient data for 

 ascertaining in what direction sewer air would go. This should 

 be ascertained before more money was spent. 



Mr. Haslam, in making a few remarks in reply, said that 

 the great thing was to have a free circulation of air in the 

 drains. He expressed his willingness to confer with the others 

 on the subject at any future time. 



