14 



Mr. Charles Tomlinsons 



tion the imprint of minute parallel waves between the 

 truncated ends and the glass could be seen in action. 



Fior. 4. 



In this way a variety of pleasing figures can be obtained, 

 all of which are in strict accordance with the note produced, 

 whether fundamental or secondary, the former invariably 

 producing stars of four points, or four distinct accumula- 

 tions of the powder, and the latter increasing two for 

 every ascending tone. By employing alcohol the funda- 

 mental tone produces Chladni's first figure, formed by 

 globules of the liquid ; thus in figure 5 the globules seem 

 to be generated simultaneously at the centre of vibration as 

 indicated by the fans, and are thrown upon the quiescent 

 portion of the liquid and point out the nodes. 



Fi-. 5. 



This figure is of course only seen while the glass is being 

 operated on by the bow. Lycopodium sinks in alcohol, 

 but a film of minute particles remains on the surface, which 



