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| (full-size image: 394 kB) The front of the slide rule has the following scales: K DF [ CF CI C ] D A. These are conventional scales, except that the DF and CF scales are folded at 360 (the number of interest-days in the year). At the right-hand ends they are labelled x3 P/Int. Days R% Days Int x2 to assist in business use. There is an extra small cursor line (slightly to the left of the main line) which can be used when interest is based on a year of 365 days. In addition there are a 27 cm ruler and an L scale on the upper edge. |
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| (full-size image: 128 kB) There is a conversion scale for English currency on the lower edge, with the decimal equivalents in £ shown opposite the sh/d (shillings and pence) amounts, eg 11s 1d = £0.554 |
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| (full-size image: 388 kB) There is a range of conversion factors printed on the back of the slide rule, eg 67 Russian Tschetwerts = 150 hectolitres. The back of the slide has a C scale and two log-log scales (LL1 and LL2) which can be used for compound interest calculations. To assist in this, there are extra graduations for 1%, 1.5%, 2%, …, 10% below 1.01, 1.015, 1.02, …, 1.1 on the LL1 scale. The slide must be turned over to use these scales. |