Dear All
I've been asked the following questions by someone who is
transcribing an 1815 essay. Any suggestions?
>In 1840 Sykes' bleachworks in Stockport were using "Warwick
>manganese from Blinkhorn grinding, 1s. 6d." What is 'Blinkhorn'?
>I've searched but turned up nothing. I assume it is (was) a place
>name - but is it associated with the 'grinding' part and not the
>'Warwickshire' part? Were there Mn mines in Warwickshire at that
>time?
>
>In 1843 they were buying "Devonshire manganese and Warwickshire
>manganese." Was Warwickshire an important source of manganese?
>
>The essayist states that when poor manganese ores were used they
>needed more sulphuric acid to generate less chlorine (from the
>salt). I would have expected LESS acid to be needed but perhaps if
>the ore was of low Mn content it might be high in carbonate. This
>would also react with acid and so the operative would find it
>necessary to use more acid. Did poor Mn ores contain a lot of
>carbonate (carbonate of which metal?)?
Dave
--
Dave Linton
Tel: (01341) 280901 (UK) +44 1341 280901 (international)
Fax: 0870 124 9761 (UK)
http://www.hendrecoed.org.uk/
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