SEE Compton, Ray. BROWN, MAYME A. Directions for the duplex music transposition slide scale.

The furniture necessary for the school consists of a desk for the master; seats for the children; lesson-stands; stools for the monitors; slates and pencils; pictures and lessons on scriptural subjects; pictures and lessons on natural history; alphabets and spelling lessons; brass letters and figures, with boards for them; geometrical figures, &c.; and the transposition-frame, or arithmeticon, as it has been called.