president's address — SECTION H. 169 



bustion. The vapours and gases given off in drying the 

 I'efuse are not nearly so offensive as those given off" in 

 incipient burning before the material gets into the condition 

 of active burning. These vapours and gases in the Fryer's 

 Destructor are supposed to be destroyed in tlie muffle furnace, 

 but it is clear that this furnace must offer considerable 

 obstruction to the draught. In Cracknell's Destructor they 

 are supposed to be destroyed as soon as they are generated, 

 by means of the high temperature of the reverberatory 

 furnace. I consider Cracknell's Destructor to be much 

 more in accordance with the ]n'inciples necessary to insure 

 perfect combustion than Fryer's. The success of each will 

 depend upon the quantity of combustible material contained 

 in the refuse. I think it is most desirable to destroy this 

 refuse somewhat in the manner indicated, rather than follow 

 the objectionable ])ractice of depositing the refuse on low- 

 lying land, and endangering the health of the community. 

 I have endeavoured to explain the various methods by 

 means of which the Sanitary conditions of Cities and Towns 

 may be improved, and thereby rendered much more desirable 

 places for people to live in; and I hope I have succeeded in 

 representing to you the various matters which must be con- 

 sidered before deciding upon any particular system which 

 may be proposed for towns in Austraha, Tasmania, and New 

 Zealand. 



