This volume is dedicated to the early calculating machines and their functional principles, accompanied by an interview with the collector Helmut Waldbauer. In addition to an introduction to the development of mechanical calculating devices, a specialist article sheds light on the switching pawl machines by Curt Dietzschold and Friedrich Weiß. A detailed documentation of the Waldbauer collection rounds off the overview of these historical calculating aids.
24,5 x 30 cm, paperback
ISSN 0941-7036
Only available in German.