Hi Guys,
Just been going through one of my older electrical texts here.
This book is called The Principles and Practice of Electric Wiring, dated 1921.
Thought I'd scan and post a few of the pictures:

Square stoneware conduits:

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Various fittings from the period:

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Steel conduit and fittings:

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An Oven from the period:
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Quick and Slow Blow Domestic fuses:
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[This message has been edited by Trumpy (edited 07-08-2006).]