|Name and Model Number||Music String Calculator|
|Country of Origin||England|
|Date of Manufacture||1990|
|Front Scales||4 specialised|
|Scale Length||36.7 cm|
|Type of Rule||Slide Rule|
|Construction||Cardboard on Wood|
|Area of Use||Other|
|Comment||Though the dimension and composition of strings for different musical instruments are defined by various scaling rules and much experience,
frequency depends on the dimensions in a way summarised by the formula on the slide rule which contains 5 variables and 2 constants.
This slide rule translates the formula into analog form and generalises it to most types of music string.
|Donor||Collection of Patrick Barrington|
|RR||= Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace.|
|RRR||= Very rare -- only very few known to collectors; may take several years before one comes up for sale.|
|RRRR||= Extremely rare -- a museum piece; unlikely that an example will ever come up for sale.|