A system of natural philosophy : in which the principles of mechanics, hydrostatics, hydraulics, pneumatics, acoustics, optics, astronomy, electricity, and magnetism, are familiarly explained, and illustrated by more than two hundred engravings : to which are added, questions for the examination of pupils : designed for the use of schools and academies /

Mode of access: Internet.

A complete system of mensuration of superfices and solids, of all regular figures : calculated for the use of schools, academies, and private learners /

On cover: Published 1834.

A new system of arithmetick : in which the rules are familiarly demonstrated and the principles of the science clearly and fully explained ... /

At head of title: Ruger's arithmetick, with questions and answers.

A new and complete system of arithmetick : composed for the use of the citizens of the United States /

Mode of access: Internet.

The elements of arithmetic ... in which decimal and integral arithmetic are combined, and taught inductively, on the system of Pestalozzi. Part 1st [2d].

Mode of access: Internet.