422 



Mr. Charles Tomlmsans Experiments 



the interval between which has been a second or a third ; 

 but with small vessels it is difficult to obtain secondary 

 tones. 



123. The explanation of the above phenomena, where 

 vessels with lips and handles had been employed, appeared 

 very easy; but if the same phenomena were producible 

 from vessels of china-ware, &c., without lips or handles, 

 such as saucers, basins, plates, &:c.y then the theory would 

 be very obscure. I, therefore, vibrated a variety of such 

 vessels as were not furnished with lips or handles, and in 

 no case produced more than one fundamental note, and 

 one secondary tone of each kind ; that is, I could procure 

 the first and second secondary tones, but neither these 

 latter nor the fundamental were ever doubled.* In these 

 cases every thing agreed with my past experience, and the 

 views before detailed (99), which I then stated, I believed 

 would apply to vessels of porcelain and crockery ware, as 

 well as of metal. 



124. The cause, then, of the production of two funda- 

 mental notes, and of two secondary tones of the same kind 

 from the same vessel, is to be found in the lip or handle, 

 and a reference to the two following figures will at once 

 explain the whole cause. 



Fig.l. Fig. 2. 



* I have examined basins of many kinds, where the rims are plain, and where 

 they describe waving lines ; also basins where the rim is turned down, and pre- 

 sents a horizontal surface, as a wash-hand basin, and in none of these cases was 

 the notes of each kind double. 



