Remarks on Mr Facob’s Obſervations, 253 the carriage is going upon perfedly e- ven road, being no more than what is ſufficient for overcoming the fridion of the wheels. But every obſtacle over which the wheels are to be driven, muſt increaſe this preſſure upon the fore ſide of the buſh. From this it is evident, that when an axle is ſtraight below, the taper of the arms on the fore ſide will cauſe the wheels to preſs outwards, unleſs this preſſure is balanced by ſome other. This may be done, either by bending the axle downwards, which will produce a preſlure inwards, ſuffici- ent to balance this preſſure outwards, of which we have now been ſpeaking-

Or, it may be more perfeâly done, by keeping the axle ſtraight below, and bending it a little forwards, in the man-

ner