 |
| (full-size image: 126 kB) The slide rule has the following scales: Sought [ Found CI C ] D L, although CI C D and L are not labelled. The Found and Sought scales have a range of elements and molecules positioned opposite their atomic/molecular weights on the C and D scales. The C and D scales are 25 cm long. Unfortunately the cursor is missing. |
 |
| (full-size image: 211 kB) Both sides of the slide are the same, except that the Found scale has a different set of elements and molecules on each side. This picture shows the rule with the slide reversed. There is one peculiarity: H2S is shown opposite 1, even though its molecular weight is 34. |