| Name and Model Number | Dennert & Pape Chemical Slide Rule |
| Country of Origin | Germany |
| Date of Manufacture | `1924 to 1930 |
| Front Scales | Chemical, back of slide has more chemicals |
| Back Scales | A table giving the molar mass of various elements or compounds |
| Scale Length | 25 cm |
| Type of Rule | Slide Rule |
| Construction | Mahogany wood with celluloid scale surfaces. |
| Area of Use | Chemical |
| Comment | This example was made by Dennert and Pape and distributed in the USA by Scientific Instrument Company of Pittsburgh (later Fisher Scientific). The words on the slide, Analysen-Stab Nach Dr. Tisza translate to "Analysis Staff or Rod After Dr. Tisza." |
| Rarity | RR-RRR |
| Donor | Collection of Richard Davis |
| Match Number | 162 |
| Thumbnail (Click Picture for Details) |  |
| In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen |
| (1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD. |
| • RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace. |
| • RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale. |
| • RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale. |