Ready reckoner for ship's cargoes

Made:
1807 in London

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group
© The Board of Trustees of the Science Museum, London

Science Museum Group
© The Board of Trustees of the Science Museum, London

Science Museum Group
© The Board of Trustees of the Science Museum, London

Science Museum Group
© The Board of Trustees of the Science Museum, London

Science Museum Group
© The Board of Trustees of the Science Museum, London

Calculating scale, boxwood weighted with brass, 9" x 1 1/2" x 3/4" for gross and tare weights of ship's cargoes, engraved "Robert Ludgate, Custom House, London, 1807"

Ready reckoner, boxwood weighted with brass, for gross and tare weights of ship's cargoes, engraved "Robert Ludgate, Custom House, London, 1807". Tare is the weight of the packaging or container. Scales are given for finding the gross weight if the tare weight is set at at 7lbs or at a percentage of the weight of the goods.

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Details

Category:
Mathematics
Object Number:
1953-339
Materials:
box (wood), brass (copper, zinc alloy)
Measurements:
overall (flat): 20 mm x 40 mm x 235 mm, 0.71 kg
type:
ready reckoners (cargo)
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • calculator
credit:
Mr George D. Blatchford

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