xny headjand if a Man went with his Eyes ftiut, he would 
imagine himfelftn the moft fmooth way , tho- at the fame 
time there be 3 foot difference in the height of the ground 
of each wheel. In fine, we have made lo many and fo 
various experiments, and are fo well latisfied oftheufe- 
fuUneisiot thclnventibn, that we have each of us be- 
fpoken opci they axe- not (Plain J above fix or eight 
pound a piece. 
Dublin,. 
May s^h, K^Sf- 
