|Name and Model Number||Vade Mecum |
Timber Slide Rule
|Country of Origin||England|
|Date of Manufacture||c. 1900|
|Front Scales||A [ B C ] D, /measuring scales 1/8", 1/4", 3/8"|
|Back Scales||E F [ G G/ H1 H2 H3 I ] J K|
|Type of Rule||Slide Rule|
|Construction||Boxwood with brass end braces|
|Area of Use||Other|
|Comment||For calculating the volume of timber in logs.
Designed by George Bousfield for the timber trade.
Designed to be held vertically when used.
|Donor||Collection of Clay Castleberry|
(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.|