Introductory.

Addition of money, in small and large sums, occupies a portion of the time of almost all persons, especially bankers, merchants, tradespeople, and housekeepers; the object of this Machine is to enable this work to be done by mechanical means with perfect accuracy.

All the weariness of mind often caused by long nights spent in trying to find some small mistake in a balance-sheet, can be completely obviated by it.

The tradesman or housekeeper, who does not even know how many pence there are in a shilling, or how many shillings in a pound, can, provided he has eyes to read figures, unaided produce his monthly accounts, and make up his ledgers without a mistake after he has once learnt to work the Machine; this knowledge can be thoroughly acquired in a very short time, some persons have achieved it in less than five minutes.

Instructions are issued with each Machine, so as to render failure impossible.

This Machine combines simplicity with accuracy, has no complicated machinery in it, and is guaranteed to last for years—without repair.

Any sums in addition, either in plain figures or in money, can be performed with it.

All the cylinders are constructed upon the same principle, so that to know how to work one is to know how to work all.

Machines for adding weights or measures of any kind can be supplied by applying to Messrs. Stowe Brothers, 82 Essex Street, Strand; or, to Leonard Stowe, Wellington, New Zealand.

Description.

The Machine consists of a number of cylinders, or rollers, with figures printed thereon, zero or naught being represented by a red square. To the left of the cylinders are a number of Indicators, each of which records every perfect revolution of its corresponding cylinder.

How to work it.

To place the Machine ready for work the indicators must be turned until zero or naught is visible; and the cylinders must be turned so that the zero or naught on the extreme left i.e., nearest to the indicators is visible.

The Machine being placed as directed, we will proceed to exemplify its mode of working—using the units cylinder.

First Example.

Turn the cylinder towards you till 4 appears in the first column at the left end—stop, start again from the Zero or Red Square, now visible till you come to 5 in that column; start again from the Zero or Red Square, now visible, till yon come to 7 in that column; start again from the Zero or Red Square, now visible, till you come to 3 in that column; start again from, the Zero or Red Square, now visible, till you come to 4 in that column.

On looking at the Indicator you will find figure 2 recorded, and figure 3 will be the figure now visible at the left end of the cylinder, the two together making 28 which is the required total.

N.B.—The result of any addition will always be found by reading the figures recorded on the indicators together with the first figure on the left end of the cylinders.

Another Example.

Still working only on the units cylinder.

Indicator marks 2; first figure on left end of cylinder 7.

Set down 7, turn the Indicator to Zero, and start with 2 at the left end of the cylinder. page 3

• Turn to you, starting from the Zero now visible, till 5 appears in that column.
• Turn to you, starting from the Zero now visible, till 5 appears in that column.
• Turn to you, starting from the Zero now visible, till 1 appears in that column.
• Turn to you, starting from the Zero now visible, till 9 appears in that column.
• Turn to you, starting from the Zero now visible, till 6 appears in that column.

The Indicator marks 2; first figure on left end of cylinder 8.

Indicator marks 1; first figure on left end of cylinder 4.

Set down 4, turn Indicator to Zero, and start with one at the left end of the cylinder,

• Turn to you, starting from the Zero now visible, till 2 appears in that column.
• Turn to you, starting from the Zero now visible, till 1 appears in that column.

The figure at the left end of the cylinder is 4.

The total obtained is 4,487.

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.