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.
|