Weights and measures. 4 a! Emerson, William. 1701-1782. Noe 3 in **E.5117. Calculation, libration, and mensuration; or the arts of reckoning, weighing, and measuring. Being a mechenical work, adapted to the business and practice of tradesmen and artificers. London: Je Noursee 1770. 168 pp. Folded Plates. 8°.