Beschreibung verschiedener Elektrisirmaschinen zum Gebrauch für Schulen
A German instrument manual by Johann Conrad Gütle, published in Leipzig and Nuremberg in 1790, describing electrostatic machines for use in schools. Copperplate figures show friction globes and glass discs on turned wooden stands, brass-knobbed conductors, chained Leyden jars and battery boxes, each part lettered and grouped as numbered figures on open plates.
