Stoney — On Gearing for Bicycles and Tricycles. 



23 



the left foot acts, and finally e on /, which is keyed to the axle of 

 the second driving wheel of the machine. The intermediate 

 wheels c and d are introduced only to make the arrangement more 

 compact. If abundant space can he allowed, these intermediate 

 wheels may be dispensed with by making 6' and e large enough to 

 act directly on one another. 



The balance gear here described might, perhaps, sometimes 

 with advantage, be applied to the countershaft of the machines 

 which are provided with a countershaft. 



In all cases where balance gear is employed, we wish to point 



cc t^ \^^ 



Fi"-. 



out that the machine. may be guided by adequate breaks which 

 may be applied to one or other of the- driving wheels at will. We 

 have found wood a good material for powerful breaks which are to 

 act upon the rubber of a wheel. 



