| Slide rules HOME page | COLLECTION | NON-STANDARD RULES |
| Make | Fowler, Manchester, UK |
| Model | Long-scale |
| Notes 1. In original leather case. 2. A copy of the instructions can be found here. 3. On the front face there is a "long" scale, over several circles, and a "short" scale, the outer circle only. 4. On the rear there is another short scale and trig and log scales. |
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Front view |
Back view |
Detail - showing long scale |
Detail - showing trig and log scales
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| Manufacturing date | 1954 (date on slip of paper in box) |
| Length | Circular |
| Material | |
| Scales | Front face: "short-scale" and "long-scale" logarithmic. Rear face: "short-scale", reciprocals, square roots, sin, tan, sin/tan |
| Documentation | Original documentation but damaged along fold lines. |
| Condition | Very good. |