Addition of Money.

This is performed on the Units Cylinder for Pounds, in a manner similar to the explanation given above.

The Shillings Cylinder is used in exactly the same way, and when any sum of Shillings is finished, the Pounds will be found on the Indicator and the odd Shillings on the left end of the Cylinder, in the first division.

The Pence Cylinder is used in exactly the same way, and when any sum is finished, the Shillings will be found on the Indicator, and the odd Pence, on the left end of the Cylinder, in the first division.

It is an easy matter to transfer the Shillings on the Indicator, to the Shillings Cylinder to make the addition complete, or to read off the odd Shillings on the end of the Shillings Cylinder, with the Shillings on the Pence indicator.

To Add a Larger Sum, on three Cylinders at a time.

Indicators all tinned to Zero.

Cylinders, with the Zero or Red Square at the left-hand end, in line with Indicator. page 4

• Turn the top cylinder towards you till 300 appears on the first column.
• Turn the second cylinder towards you till 40 appears in that column.
• Turn the third cylinder towards you till 2 appears in that column.
• Turn the top cylinder towards you, starting from Zero now visible, till 600 appears in that column.
• Turn the second cylinder towards you, starting from Zero now visible, till 80 appears in that column.
• Turn the third cylinder towards you, starting from Zero now visible, till 1 appears in that column.
• Turn the top cylinder towards you, starting from Zero, now visible, till 800 appears in that column.
• Turn the second cylinder towards you, starting from Zero now visible, till 10 appears in that column.
• Turn the third cylinder towards you, starting from Zero now visible, till 8 appears in that column.

Indicator, opposite the top cylinder, shews 1,000; the first figure on the left-hand end of the top cylinder is 700.

The first figure on the left-hand end of the second cylinder is 80.

The first figure on the left-hand end of the third cylinder is 6.

Total, 1,786, as required.

Lyon & Blair, Printers, Lambton Quay, Wellington.