Wheels with Broad Felloes. 669 



years ; and, although they have been used a great deal, 

 and have made long journeys, they are still in very good 

 condition. They are broader than ordinary carriage 

 wheels : the tires are two and a quarter inches in width ; 

 and the felloes are wide in proportion, and strong. 



My new wheels (also made by M. Gamier) have tires 

 4 inches broad and 5 lines thick. The felloes are 

 4 inches wide, but they are not so thick as those of 

 my last wheels : and, since the spokes are also of less 

 thickness, although somewhat broader, the new wheels, 

 seen from one side, appear lighter and more elegant 

 than the last ones. 



The three sets of wheels are of about equal heights. 

 Their several dimensions and w r eights are as follows : - 



Next to 



In the experiments made with these wheels, it was loaded 

 with three men, the owner, the coachman, and the foot- 

 man, weighing together ........... 400 



So that the total weight drawn by the horses was . . . 2121 



When experiments were made with the old wheels, 

 care was taken to load the carriage with an additional 

 weight, equal to the difference between that of the new 

 wheels and that of the old wheels then employed. I 

 found however, in the end, that without this addition 

 to the load, made to equalize the weight, the force 



