SIMPLICITY

A course of instruction is not necessary for operating the Smallwood Calculator. It is remarkably simple. One of the most valuable features is the fact that a novice can put it to practical use immediately, without the necessity of several weeks' practice and experimenting. On most expensive complicated adding machines there are at least 63 keys and several levers to manipulate to accomplish what the Smallwood Calculator will do with seven dials. No keys to push nor levers to pull.

DIAL ARRANGEMENT

You will notice that the first two dials on the right end of the machine are black, instead of brass finish as the three center dials. These two black dials are used for cents--the first one for units, the second for tens. The first brass dial (on the right) is for dollars--the second for tens of dollars, and the third for hundreds of dollars. The next black dial to the left is used for thousands and the last dial for tens of thousands.

In short, the number is placed on the machine in exactly the same order as in writing it on paper.

Above each dial is an "answer" window, through which one figure shows through. These Figures Denote Your Total, or Answer.

HOW TO "CLEAR" TO ZERO

If each of these figures is zero, the machine is "clear" and ready for business. To Clear the Machine, and bring it to zero, simply place the stylus in the triangle, and turn the dial to the Left until it comes to the stop. Repeat this on each dial where a figure (other than zero) shows above. Each dial will then show zero through its "answer" window.

HOW TO ADD

Clear the machine to zero--as indicated above. The first number to register is 67 cents. Place the stylus in the window opposite figure 6 in the second dial from the right (the "tens" dial). Turn the dial firmly to the Right until it comes to a stop holding the stylus in an upright, vertical position. The 6 will be instantly registered in the "answer" window. Now register the 7 in the same manner, in the first right hand dial (the "units" dial). You will now see the 67 cents registered on the machine through the "answer" windows.

The next item is 40 cents. Register this the same as you did the 67 cents, by placing the stylus opposite figure 4 in the tens dial and turning firmly to the right. This completes the operation for the 40 cents as It Is Not Necessary to register a zero. You will now see the total of the amounts $1.07 showing through the "answer" windows without pushing any keys or pulling any levers. The machine carried the total automatically into the dollars column, (third "answer" window).

Register the $2.55 in the same manner, taking care to start this figure in the dollars column (the third dial from the right). Your total will be $3.62. Register the $62.10 starting in the fourth dial or tens (dollars) column. Your total, $65.72, will show through the "answer" windows.

Turn the dials back to zero (as just instructed) and you are ready for the next column of figures.

COUNTING BACKWARD

CORRECTING ERRORS

A most valuable feature, and exclusive with the Smallwood Calculator, is the fact that you can turn the dials backwards. With this feature, if you should make an error in registering a number, you can correct the error and the total, no matter if you are in the middle of a column of figures. Taking the above problem in addition, for example. Register the 67 cents in the usual way. Now in registering the 40 cents, deliberately make an error by registering 50 cents instead of 40 cents. To correct this error, simply turn the tens dial backwards one window, by placing it in the second window at the bottom of the dial (the 8 window) and turning the dial backward. You have corrected your total. It now reads $1.07, and not $1.17 as before.

AN EXCLUSIVE FEATURE

The Smallwood Calculator is one of the few machines in the world, with which you can turn backwards and correct an error in the middle of a column, after the number has been registered and the total recorded. On other machines it is necessary to start the entire operation over again, or mentally carry the error.

DISCOUNTS

The same feature is invaluable for taking out discounts, subtracting special items and balancing accounts. The intricate complimentary system is not necessary as on other machines.

KEEPS PLACE ON WORK

GUARDS AGAINST INTERRUPTIONS

Here is another feature that the users of the Smallwood Calculator say is worth its weight in gold. Probably the worst objection to a person adding up a long column of figures mentally is the fact that he is almost sure to be interrupted before finishing the column. This necessitates starting anew. On the other hand, the Smallwood Calculator is especially designed so that it may be removed from the stand and placed right on the column of figures. It keeps your place and guards against interruptions. Taking the addition problem again to illustrate this point. While registering the 67 cents, the machine should be resting directly under this number. To add the 40 cents move the machine down the sheet until just under the 40 and register the number. Now move it down until just under the 255 and register this number. Now, suppose we are interrupted--the phone rings, or another of the hundreds of interruptions liable to occur. The machine rests under the last figure you have registered. You can answer the phone, or transact the momentary business, and then resume your work where you had left off. Furthermore, you have in front of you the total as far as you have gone.

HANDY AND PORTABLE

On the complicated keyboard machine, you would have to keep your place in the column with one hand, and punch keys and pull levers with the other. If you should be interrupted abruptly, you would lose your place in the column, and be forced to start the operation over again, with the same likelihood of interruption.

To illustrate the mechanical perfection of the machine, place the ammount $9,999.99 on the machine--every "answer" figure being 9 except the first dial on the left, which should be set at zero. Now add 1 cent to this amount, in the usual way, by turning the cents dial (first dial on right) one notch, using a quick, firm stroke. In doing so, you will automatically change every dial on the machine. The total will instantly read $10,000.00.

SUBTRACTION

The Smallwood Calculator is one of the very few machines, regardless of price, upon which you can subtract without mastering the complicated "complimentary" system. It subtracts as easily as it adds.

The "answer" figures are not used at all in subtraction. Forget them. The "triangle" on each dial serves as an indicator.

HOW TO SUBTRACT

Using the accompanying problem in subtraction as an example: Beginning with the fifth dial from the right, PLACE THE STYLUS IN THE TRIANGLE, and turn the dial so that the "triangle" is opposite the figure 6. Now turn the fourth dial, turn the dial so the "triangle" is opposite the figure 7. Turn the third dial so the "triangle" is opposite the figure 4. Turn the second dial so the "triangle" is opposite the figure 1. Turn the first dial so the "triangle" is opposite the figure 2. Now to be absolutely sure that you have registered the number correctly, read off the number you have registered. Beginning with the fifth dial, the numbers opposite the triangles should be 674.12

We wish to subtract 428.87 from the 674.12 we have registered on the machine. To make this subtraction, register 428.87 same as in adding. For example, begin with the fifth dial, and place the stylus in the window opposite the white 4. Turn the dial forward until it comes to a stop. Now with the forth dial, place the stylus opposite the figure 2 and turn the dial forward until it comes to a stop. With the third, second and first dials register 8, 8 and 7, respectively, in the same way.

The result (or answer) is now indicated by the figures opposite the "triangles" (beginning with the fifth dial). In the fifth dial, the triangle is opposite the figure 2. In the fourth dial, the triangle is opposite the figure 4. In the third, second and first dials, the triangles are opposite the fitures 5, 2, and 5, respectively. Therefore, our result is 245.25.

Suppose, now, we should desire to subtract further. For example, we wish to deduct 86.44 from the 245.25 we now have on the machine. Simply register the 86.44, beginning, of course, with the fourth dial same as addition, as directed above, by placing the stylus opposite the figure 8 in the fourth dia, and turning forward to the stop--then opposite the figure 6 in the third dial and turning forward to the stop--then opposite the figure 4 in the second and 4 in the first, turning forward likewise to the stop. Our balance, $158.81, is shown by the figures opposite the "triangles," beginning with the fifth dial.

HOW TO BALANCE A LEDGER ACCOUNT

JOHN SMITH

Through this unique method of subtraction, an invaluable feature for accountants and bookkeepers is brought out. Taking the accompanying illustration of an ordinary ledger account. The bookkeeper, to balance this account mentally, must add up the debits, then add up the credits, then subtract the total credits from the total debits. Three operations. Likewise, on most of the other makes of adding machines, regardless of price, you must add up the debits, make a notation of the total, then clear the machine and add up the credits, making a notation of this total, then clear the machine again and subtract the total credits from the total debits, giving the balance. Three distinct operations. The Smallwood Calculator Will Accomplish this result in One Operation.

Be sure the machine is clear. Following the directions for adding, register the debit items on the machine. You will show a total of 271.18. Beginning with the fifth dial, which shows 2 in the "answer" window, PLACE THE STYLUS IN THE TRIANGLE, and turn the dial so the triangle is opposite figure 2. On the fourth dial, which shows 7 in the "answer" window, turn the dial so the triangle is opposite figure 7. Likewise, on the third, second and first dials, transpose the figures 1, 1 and 8, respectively. Now, by reading the figures opposite the triangles in the five dials, we have 271.18. To subtract the credits, register the four credit items, as directed in the instructions for subtraction. The balance of the account, 166.04, will be indicated by the figures opposite the triangles.

BANK ACCOUNT

This method is very useful in balancing the bank account. Simply register the previous balance and subsequent deposits, and subtract the various checks.

HOW TO MULTIPLY

Using the accompanying example, multiplying 496 by 78. In our short cut method of multiplication, we take it for granted that every user of the Smallwood Calculator knows the simple multiplication tables. That is all that is necessary. The machine does the carrying and adding. We know 8 time 6 is 48. After being sure the machine is clear register 48 on the first two dials in the usual way, so that 48 shows through the "answer" windows. We know 8 times 9 is 72. Register this on the second and third dials (768 will show on in the "answer" windows). We know 8 times 4 is 32. Register this on the third and fourth dials (3968 now shows in the "answer" windows). Now take the 7 for the multiplier. 7 times 6 is 42. Register 42 on the Second and Third dials. 7 times 9 is 63. Register 63 on the Third and Fourth dials. 7 times 4 is 28. Register 28 on the Fourth and Fifth dials. The result will show in the "answer" windows 38688.

TO TABULATE TWO ITEMS AT THE SAME TIME

Although the dials are connected so as to carry automatically from one column to another, the various dials can be used separately for tabulating two or more items at the same time. For example, we will desire to tabulate baled hay which is being loaded. We want to tabulate not only the total weight of the hay, but also the number of bales.

For tabulating the number of bales we will use the first two Left hand dials. As one bale is loaded, weighing 110 lbs., we register the 1 in the second dial from the left end of the machine and register the 110 in the first three dials on the right end of the machine. As another bale is loaded, we register 1 again in the "bales" dial, and 125 in the pounds dial. And so on. When the load is complete, we not only have the total number of bales, but also the total number of pounds.

PARTIAL CLEARANCE

If you should desire to clear the number of pounds off the machine, but want to keep the number of bales on the machine, the pounds can be cleared to zero in the usual way, without affecting the number of bales. This in an exclusive feature of the Smallwood Calculator. To our knowledge, no high-priced adding machine in the world possesses this feature.

FRACTIONS, FEET AND INCHES, ETC.

This method of tabulating several items at one time can be applied in hundreds of various ways, such as tabulating grain (bushels and pecks at the same time), loading lumber (feet and inches at the same time), fractions, etc. The ingenuity of the device gives an opportunity for the ingenuity of the operator to display itself in the working out of new problems.

HOW TO DIVIDE

Just as multiplication is a short form of addition, so division is a short form of subtraction. The remarkable subtraction feature of the Smallwood Calculator therefore makes division extremely simple. Take the example of 576/24. Register the dividend opposite the "triangles," same as in subtraction, on the three right hand dials, all the other dials being clear. Now subtract 24 from the first figures from the left from which it can be subtracted--in this case 57, as many times as possible. You will find it can be subtracted 2 times when 09 will be in the place of the 57--leaving 096 on the machine. Use the extreme Left hand dial as a counter and register the 2. Now subtract 24 from the last two dials as many times as possible. It can be subtracted 4 times, when 096 will become 000. Register the 4 on the sixth dial, next to the 2, and you have the answer--24.

Please weigh carefully all the unusual features of the Smallwood Calculator--its remarkable utility, handiness, durability and price, as we will be genuinely grateful if you can offer your voluntary commendation of the little machine.