130 THE APPLICATIONS OF PHYSICAL FORCES. [BOOK n. 



unclamps the hammer, the wheel work is set in motion to place a 

 fresh hammer on the catch ready for the fingers to free in the repeti- 

 tion of the note." 



The difference between the old system and that of M. Collin 



FIG. 84. Modern key-buard carillon at St. Germain 1'Auxerrois. 



consists then, instead of directly lifting the hammer, in using an 

 intermediate mechanism between the lever and the key which 

 reduces the work to a minimum. 



