Physical description

Wooden box (28.1) containing the following (11 items + 2x21disks (sets A &B): 28.2: black enamelled harmonic analyser (main body,serial no. 37 28.3: plastic slide rule (40 inch) 28.4: Instruction manual 28.5: Long steel metal rule (92 cm) with handles 28.6: Wooden clipboard with paper 28.7: brush 28.8: fixed arm planimeter Serial No. 25498 - 4 components and box 28.9: fixed arm planimeter Serial No. 25499 - 4 components and box 28.10 Harmonic analyser black piece 28.11 Harmonic Analyser long metal attachment 28.12 Harmonic Analyser short metal attachment 28.13 - 28.55: 42 metal discs (not numbered individually) 28.56 Key to box (not numbered)

Inscriptions & markings

Front right hand side of box in texta: “GW7446”; on inside lid of box: “GW7446”; On harmonic analyser in white: “No. 3 Harmonic Analyser Stanley London Serial No. 37. Made in England”; On clipboard (28.6): ?“P.Cholec Shade”; Stamped on brush (28.7): “Made in England Pure Bristle”; Label in planimeter box (28.8): “7/124/F/152/500 Fixed Arm Planimeter Serial No. 25498. 1 Rev = 100 sq. cms. Constant = 18.676”. Inscribed on planimeter (28.8): “Albrit 25498 Made in England” Label in planimeter box (28.9): “7/124/F/152/500 Fixed Arm Planimeter Serial No. 25499. 1 Rev = 100 sq. cms. Constant = 18.676”. Inscribed On planimeter (28.8): “Albrit 25499 Made in England” On discs 28.13-28.55: Half are “A” disk and half are “B”. All are inscribed.