The Harmonium School (Op. 5) was written by Ernst Stapf, and first published in German as Praktische Anleitung zum Harmonium-Spiel. It is a practical guide to playing the Harmonium (orAmerican Reed Organ), and a rare example of the wide range of method books that were published during the heyday of the instrument in the latter part of the 1800s and the early 1900s.

wrote few works that havesurvived to this day, but is perhaps best known ...