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Adam R. Barr of Conestoga Township, Pennsylvania, created this mathematics exercise book or cipher book of mathematical operations, rules and theorems, and example problems. Sections labeled with calligraphic lettering include the Single Rule of 3, Double Rule of 3, Simple Interest, Insurance, Commission, Barter, Fellowship, Exchange, Vulgar Fractions, Decimal Fractions, and others.

Adam R. Barr of Conestoga Township, Pennsylvania, created this mathematics exercise book or cipher book of mathematical operations, rules and theorems, and example problems. Sections labeled with calligraphic lettering include the Single Rule of 3, Double Rule of 3, Simple Interest, Insurance, Commission, Barter, Fellowship, Exchange, Vulgar Fractions, Decimal Fractions, and others.

This collection is made up of two cypher books kept by Ambrose H. Huber of Hereford, Pennsylvania, between 1866 and 1868. The books include problems and solutions in multiplication, fractions and decimals, arithmetical progression, roots, weights and measures. One volume has a yellow paper cover and the other a blue paper cover. The printed covers depict George Washington beside an American flag, with ships in the distance. On the backs of the volumes are printed advertisements for J. Washington Miller, Stationer and Publisher, No. 204 North Third Street.

This arithmetic copybook was compiled by an anonymous student in the nineteenth century. It includes rules and examples for addition, subtraction, multiplication, and division, as well as practical examples relating to money and weights and measures.

This currently unidentified student's cypher book contains mathematical rules and examples largely in the service of commerce. Entries relate to the addition of money, addition of Troy weight, addition of dry measure, subtraction, a numeration table, a multiplication table, the Golden Rule (i.e. the rule of three), and similar concepts. Currency in this volume is almost exclusively British coinage, but at least one problem references conversion of British pounds into the (newly created) U.S. dollar. The covers of the volume are (apparently re-used) canvas, possibly sailcloth. The cypher book was owned by the Higgins family of Cape Cod, Massachusetts, and it contains names of Higgins family members, but the author is yet undetermined.

This collection is made up of seven penmanship books and six cypher books kept by brothers Stephen Plumer, Daniel T. Plumer, Horace Plumer, and unidentified individuals, dating from 1831-1832 (11 volumes are undated). As the books came from the same source, the unidentified volumes are likely by members of the Plumer family of Newbury, Massachusetts.

The seven penmanship books include two by Daniel T. Plumer, one by Stephen Plumer, and four by unidentified individuals. The students practiced writing individual words and short, largely moral and practical statements. Examples include: "Circumspection," "Saratoga," "Cherokee," "Choctaw," "Empyrean," "Command respect by deportment," "Incumber not the mind with toys," "Sound the waters of science," "God made the world," and many others.

The cypher books include one by Horace Plumer and the others by unidentified individuals. The volumes include arithmetic, decimals and fractions, proportions, weights and measures, Federal and English money, currency exchange, mercantile word problems, copies of bills of exchange, alligation, and interest.