Concrete Volume Computer - Imperial and Metric Units

Made by Blundell Harling Limited in Weymouth, Dorset, England, United Kingdom, Europe, 1970-1980.

This slide rule is from the collection of calculating instruments assembled by Assoc. Professor Allan Bromley. His collection provides examples of most forms of calculating devices made from the early 18th to the late 20th centuries. Slide rules constitute a substantial proportion of this collection.

Over the 19th and much of the 20th centuries the slide rule was the primary instrument for calculation used by many people engaged in the trades and in engineering. Although originally invented in ...


Slide rule, Concrete Volume, plastic folded wrapper around sliding plastic card. Except some transparent spaces on the wrapper (allowed to be read through), the rest of wrapper is printed in orange with scales and text printed in black. The sliding card is white with scales printed in black.

With scales for Depth, Width, Length and Volume.
Instructions: Set width or height against depth (or thickness) and read off volume against length.


46 mm
3 mm


Made for Australian Blue Metal (Darwin), A Division of Readymix Group, S.A.
Supplied by Australian Data Converters (Adelaide). Mfr'd by Blundell Harling Ltd, Weymouth, England.
Blundell Harling Limited 1970-1980


Australian Blue Metal was established by the O'Neill family of Perth to quarry basalt in the early 1950s. They were taken over by Readymix in 1957 who were subsequently engaged in the sealing of the highway across the Nullarbor. Readymix later became a subsidiary of CSR Ltd.
Bromley, Allan 1978-2002


Donated through the Australian Government Cultural Gifts Program in memory of Associate Professor Allan Bromley, 2010
20 January, 2010

Cite this Object

Concrete Volume Computer - Imperial and Metric Units 2015, Museum of Applied Arts & Sciences, accessed 21 November 2017, <>
{{cite web |url= |title=Concrete Volume Computer - Imperial and Metric Units |author=Museum of Applied Arts & Sciences |access-date=21 November 2017 |publisher=Museum of Applied Arts & Sciences, Australia}}
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