Calculating machine
| View Cart ⇗ | Info
A machine for adding and subtracting by mechanical means.
Galleries
CalculatorsSource
Chandler B. Beach The New Student's Reference Work for Teachers Students and Families (Chicago: F.E. Compton and Company, 1909) 1:305
Downloads
2400×2101, 901.8 KiB
1024×896, 201.3 KiB
640×560, 104.2 KiB
320×280, 34.7 KiB