Extract on the ventilation of coal mines, from 'An Elementary Text-Book of Coal Mining, 1909, pages 206-207 [image 1 of 2]

Description

These pages describe how adequate ventilation can be achieved in coal mines.

Owner:
Rosemary Boyns (Private Collection)
Creator:
Unknown
License information:
Reproduced by permission of Rosemary Boyns (Private Collection)
All Rights Reserved
Copyright Details:
Private Collection 2003
Publisher Ref:
GTJ67005
Item uploaded:
19/3/2010
Date originally created:
1909
Views:
1880
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0

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