A complete and practical system of double entry book-keeping, containing three sets of books, illustrative of the forms, arrangements, and uses of all the principal and auxiliary books employed in the various kinds of mercantile, mechanical, and professional pursuits; designed as a Key to becker's treatise on the theory and practice of book-keeping, and as a guide for teachers and accountants: to which is added a complete set of practical business forms, including the most important in use by forwarding and Commission houses; a number of miscellaneous forms adapted to various kinds of business, abbreviated journal forms, executors and administrators accounts, &c., &c. / by George J. Becker, professor of drawing, writing and book-keeping, in girard college