Wheels with Broad Felloes. 671 



For a portion of the distance where the road was 

 rather sandy, at a walk the force amounted to from 

 92 to 100 pounds with the new wheels, and from 100 to 

 1 20 with the old ones ; at a trot it amounted to from 

 100 to no pounds with the new wheels, and to from 1 20 

 to 1 30 with the old ones. 



Over a part of this road which was still more sandy, 

 the force at a walk, as well as at a trot, was from 1 20 to 

 130 pounds with the new wheels, and from 125 to 135 

 with the old ones. 



On a part of the road which was very sandy, the 

 force was from i6oto 180 pounds with the new wheels, 

 and from 180 to 200 with the old ones, at a walk and 

 also at a trot. 



On the fine road to Saint Cloud (which is not paved), 

 between the Pont de Saint Cloud and the road to Ver- 

 sailles, the force of traction was, at a walk, from 72 to 

 80 pounds with the new wheels, and from 80 to 85 with 

 the old ones. At a trot, the force of traction was with 

 the new wheels from 80 to 84 pounds, and with the old 

 ones from 82 to 88. 



Over stones recently laid, and on which no carriage 

 had travelled, on the new road which extends 

 across the fields from Passy to Auteuil the force at 

 a slow walk, with the new wheels, was from 200 to 240 

 pounds, and with the old ones from 220 to 280. 



In the deepest sand that I could find in the Bois de 

 Boulogne, the force at a slow walk was, with the new 

 wheels, 240 pounds, and, with the old ones, from 260 to 

 280. 



When ascending slowly, by the paved road, the hill 

 which one meets in coming from the high-road to 

 Versailles, just before entering the village of Auteuil, 



