FOE BEDS AND PALATES. 77 



more than double the value of any set that has 

 ever yet been made of gold. ^ 



Mr. Harrington stated that many dentists have 

 attempted to use aluminium by soldering pieces 

 of it together, on the principle of gold- work, but 

 they have failed, because no suitable solder has 

 yet been discovered, that will connect pieces of it 

 together. By his plan, a piece can be made of any 

 form, size, or thickness that can be required for 

 the mouth, without the necessity of any kind of 

 solder whatever, either for making the beds or 

 palates, or attaching the teeth. On account of 

 the extreme lightness of the metal, molar teeth 

 can be made entirely of it, including their mas- 

 ticating surfaces. He uses flat mineral teeth, 

 and his improvements consist, first, in making 

 them with only one instead of two or more pieces 

 of platina; and, secondly in taking the strain, 

 during mastication, off the platina, by applying 

 an aluminium support at the base of each tooth. 

 By his plan, " the soft ^arts of the mouth can at 

 all times be met by round, instead of sharp 

 cutting edges ; a perfect fit will be insured, which 

 has never before been attained, either in gold or 

 bone ; cleanliness will be preserved, because there 

 will be no cavities in which food can lodge ; and, 

 added to these advantages, the teeth will combine 

 lightness, firmness, efficiency, and durability, at 

 less expense, greater certainty of arrangement 

 and fit, with simplicity of construction. All sol- 



