Calculating machine Small 320×280 Medium 640×560 Large 1024×896 Download Tiff Original 2400×2101 | (901.8 KB) Description A machine for adding and subtracting by mechanical means. Keywords adding, calculating machine, calculator, subtracting Galleries Calculators Source: Chandler B. Beach The New Student's Reference Work for Teachers Students and Families (Chicago: F.E. Compton and Company, 1909) 1:305
