12 Mr, Charles Tomlinsons 



phere, he could not contain his joy ; he actually danced 

 about the room in ecstatic delight. 



Thus was a new light thrown upon this branch of 

 chemistry. Perhaps, the discovery has been too highly 

 lauded, but there can be no question that it was a great 

 discovery. The author, undoubtedly, had some strong ana- 

 logies to conduct him in his research. It was, therefore, 

 dissimilar to the results of Newton ; the one was the conse- 

 quence of the action of a powerful agent, directly applied ; 

 the other, of observation, deep reasoning, and mathemati- 

 cal calculation. 



(To he continued.) 



Article II. 



Experiments and Observations on Visible Vibration, By 

 Charles Tomlinson, Esq. 



( Continued from vol. iii. page 370.^ 



101. This splashing of the water can, however, be pre- 

 vented by covering the surface with a very thin coating of 

 lycopodium ; the vibration of the glass will dispose the 

 curved line round its interior side and a similar line will 

 be formed on the surface of the water, the arcs in both 

 cases corresponding with each other ; and, in this way, by 

 careful application of the bow, sets of figures can be obtained 

 analogous to that which has already been given (81) as the 

 fundamental figure when mercury is employed. These 

 figures can be obtained from glasses of any shape or dimen- 

 sions, and I have usually employed coloured water, sifting 

 a light coating of lycopodium upon the surface. The follow- 

 ing and analogous figures, however, were obtained from the 

 conical glasses two- thirds filled with coloured water: figure 

 3 indicating four nodes resulting from the lowest tone. 

 The second tone affords a figure of six curves, and from 

 the third tone a figure of eight curves indicating eight 

 nodes is obtained, and so on, increasing two curves in the 

 figure for every ascending tone. The curves within the 

 circumference represent the extent of the repulsion of the 

 dust from the centre of vibration, which is indicated by 

 dots placed upon the circumference, which is of course the 



