Details and Image
|Item#||Type||Model No.||Match No.||Variant No.||Model Name||Maker||Country||Production or Serial No.||Material||Scale Length||Date||Condition
|KEU532||Linear||n/a||n/a||n/a||Beatley I-Q||Keuffel & Esser||USA||None||Boxwood w/printed scales||"8"||1922|| C3
Notes: Special slide rule for computing IQ based on chronological age and mental age (presumably measured by tesing). Copyrighted in 1922 by Bancroft Beatley and manufactured by K&E.
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