348 



Description of the Kaleidophone, 



decreasing magnitudes, they cease to be visible. In the case 

 just described the eUipses make a right angle with each other ; 

 but by altering the direction of the motion, so as to render it 

 oblique to the direction of the pressure, they may be made to 

 intersect under any required angle, and when this angle = 

 the motion will be merely vibratory. 



Every single sound formed by the subdivisions of the rod will 

 present similar appearances, but the excursions will be smaller 

 as the sound is higher, or, which is the same thing, as the 

 number of the vibrations increases. 



In the most simple case of the co-existence of two sounds, 

 shown by putting the entire rod in motion, and producing also a 

 higher sound by the friction of a bow ; the original figure will 



