The American youth's instructor; or, A new and easy guide to practical arithmetic : Wherein the rudiments of common arithmetic, vulgar the decimal fractions [sic], the extraction and use of the square and cube roots, &c. are so easily treated of, and so plainly demonstrated, that any person may, of himself (in a short time) become acquainted with every thing neccessary to the knowledge of business. : To which is added a postscript for the use of country youths in particular; shewing how to measure any regular piece of timber, tyling, thatching, brick-work, or piece of land; as also how to gauge any cistern, piece of malt, or common cooler, tub, or cask. : The whole designed for such as have hitherto neglected or have not had opportunity of being acquainted with figures; and attempted in natural and familiar dialogues, in order to render the work more easy and diverting, as well as useful to learners. : Recommended by several writing-masters and accomptants. / By Daniel Fenning. Author of The ready-reckoner and Man of business.