WITH DBY HEAT. 213 



A small piece of india-rubber tubing is then brought 

 from this ring to the boiler, which throws a jet 

 of steam through the flame of these burners, and 

 this gives an atmosphere heated, moist, and beau- 

 tifully equal in every respect. This is intended 

 more particularly for the working out of the base 

 I referred to. As soon as my hands are more at 

 liberty, I purpose having this base either with or 

 without sulphur. Dry heat is often a failure in a 

 confined form, but in an open form it is most 

 successful, and in proof of which I have brought 

 these specimens of vulcanite and my apparatus 

 here to-night. 



Mr. Fletcher read the following paper : — 



In introducing to your notice this evening 

 some remarks on the mechanical contrivances we 

 at present possess for reducing irregularity in the 

 growth of the permanent teeth, I intend to allude 

 more particularly to the means required in the 

 treatment of those cases which are most com- 

 monly met with in our practice. 



Much must necessarily be left to the judgment 

 of the operator, in selecting those means best 

 suited to the particular case, and in which he has 

 the greatest confidence; and as many are frequently 

 found following one system in almost every case 

 where success has attended its use in some, simply 

 for the reason that they have not seen any others 

 offering greater advantages. 



