A variable scale ration planimeter, calibrated in imperial units and in metric units. Housed in a black case with hinged lid. Complete with calibration table inside the case.planimeter, scientific instruments

Planimeter consisting of brass disc and measuring instrument made of white disc and attached bar. To measure area up to about the size of one A4 page. The instrument is stored in a black hinged box with purple velvet lining and small metal catches. Instruments instructions are attached to a label on the inside of the case. A small key is attached to the case lid by string. (23.1 = box, 23.2 = brass disc, 23.3 = planimeter)On planimeter (23.3): “G.Coradi Zurich Switzerland No. 3509” On box (23.1): “Nat. Phil. Lab. No. 1199, Gebr Wichmann Berlin”

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)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.

See F23

Adjustable Allbrit planimeter calibrated for imperial units. Assembled to use with the magnifier which can be rotated. There is a checking bar. One revolution = 10 sq inches. Accessory box covered in leatherette with blue velvet padding.Inside the box (insert): 'SCALE / VERNIER POSITION ON TRACER BAR / AREA OF ONE REVOLUTION OF THE MEASURING WHEEL SCALE / ACTUAL / CONSTANT / SCALEallbrit planimeter, mathematical instruments

Map. Kimbolton, Parishes of Kimbolton and Lyell, scale 20 chains to 1 inch. Area by Planimeter 6258 acres. Knowsley. 10 1/2 miles to Strathfieldsaye. Campaspe River at bottom right of map. (number 365 in map cupboard 1)map, bendigo, allotments

Map. Rifle Range, Parishes of Wellsford and Sandhurst. Scale 20 chains to 1 inch. Total area by Planimeter 5916 acres. Wallan and Bendigo Railway line. Rifle Range. Axedale township and station 8 miles. To Longlea Ryl station 2 1/2 miles. To Epsom 1 1/2 miles. To Bendigo 3 miles. Compiled in W.P.D. from Assessment and Parish Plans by H.A.D 8-7- 29 (number 367 in map cupboard 1)H.A.D.(H.A.Darby)map, bendigo, allotments

1: Small cardboard box with lid containing Silver distance Measurer. This was used for Measuring distances on plans.(Planimeter) 2: Cardboard Box without lid containing three plumbobs: One large turned brass: one small turned metal. One circular silver coloured metal complete with string and winding board. These were used to locate survey equipment above a fixed point. 3: Timber ( Vic Ash?) dovetailed box with brass hinged lid and brass swing catches containing plywood templates called railway curves, used for drawing curves on plans. 4: Cardboard box with lid containing Allbrit panimeter in Bakelite/plastic box with silver metal hinges and catches "Shire of Kara Kara" inscribed on the box. The box contains the original Instructions. The Planimeter was used for calculating areas of Irregular shapes and used for estimating quantities from plans of cut and fill projects, as one example. 5: Timber Box with brass hinges and swing catches wand leather carry Strap containing one set of self adjusting level made by E.R. Watts and Son, London England. Paper label on the inside "Shire of Stawell". Also had paper instructions pasted to the inner lid. The level was used for taking Ground Levels. The first 3 have been in use up until the 1990's, when computer drafting took over the role of these instruments with greater speed and accuracy. The dumpy level would have been superseded in the 1980's when automatic levels became cheaper, and were more accurate. stawell