2. Elevation of the wheels and axis of ditto.
3. Elevation of framing only of ditto.
4. Section of adding wheels and framing together.
5. Section of the adding wheels, sign wheels and framing complete.
6. Impression from the original wood block.
7. Impressions from a stereotype cast of No. 6, with the letters and signs inserted. Nos. 2, 3, and 5 were stereotypes taken from this.
8. Plan of adding wheels and of long and short pinions, by means of which stepping is accomplished.
N.B. This process performs the operation of multiplying or dividing a number by any power of ten.
9. Elevation of long pinions in the position for addition.
10. Elevation of long pinions in the position for stepping.