A TREATISE Ο Ν ON MENSURATION, BOTH IN THEORY and PRACTICE. By CHARLES HUTTON. NEWCASTLE UPON TYNE: Printed by T. SAINT for the AUTHOR, and for I DUKE and EARL of NORTHUMBERLAND. MY LORD, AM well aware how prefumptive the world wilł think me in being defirous of having the name of one of Your illuftrious rank, and univerfally confeffed abilities in every branch of literature, prefixed to the performance which I now have the honour to present to Your Grace: Yet I hope it will do me justice, and not think that I am weak enough, in fo doing, to have the vanity to suppose I had any |