This page on how to add with the Brunsviga 13RK mechanical calculating machine is part of the manufacturer's instruction
book. It assumes a knowledge of the component
parts of the calculating machine.
Page from the manufacturer's instruction booklet on how to add with the Brunsviga
13RK mechanical calculating machine. Instructions for subtracting start on
this page and continue on the next page.
This website Join me in the 1900s is
a contribution to the social history of everyday life in 20th century Britain
from the early 1900s to about 1960, seen through personal recollections and
illustrations, with the emphasis on what it was like to live in those times.