Of the Axlè Bed. 3 Now, the double of this is three inches,

| | | | | and CiD:1s: thice: feet three néthess

} therefore A B is three feet lix inches. Oed| The reaſon of this is evident from I what has been ſaid already. Li| Tn the foregoing calculation, the height Lt of| of the under fide of a ſtraight axle from u| the ground was always one of the num- A| bers to be worked with. In order to E| find this, confider figure 4. Thus it is E hi plain that h f is equal to ia, which is half the breadth of the face of the wheel, | deduéting half che width of the buſh at | 1, even with the face of the wheel. | Meaſure i h along the buſh. ik was fect| found in the way formerly directed. the I Eben we lave 1 IK ufs he; the eN height from the ground. I may here Gd ablerye, that h e will hardly ever differ Y z of |