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Degrees Twaddell

12 January 2009

Sasha Clarkson wrote: “I actually measured specific gravity in Degrees Twaddell whilst working for ICI in the labs in the mid 1970s. We used Twaddell Hydrometers to analyse the strength of solutions of sodium hydroxide and sodium hypochlorite produced in a Castner Kellner chlorine plant. The higher the Twaddell, the greater the reward for the management. You couldn't make it up!”

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