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GB405379A
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Improvements in apparatus for gas analysis, particularly for the eudiometric estimation of gaseous mixtures containing firedamp
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GB367619A
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Improvements relating to electric lamps for mines, provided with safety bells
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GB357017A
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Improvements in and relating to eudiometric apparatus especially to those for measuring firedamp
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GB338410A
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Improvements in and relating to eudiometric apparatus especially to those for measuring firedamp
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GB346739A
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Improvements relating to miner's lamps
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GB319177A
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A process and apparatus for the volumetric analysis of gas such for instance as firedamp in the atmosphere
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GB316281A
|
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Improvements in and relating to miners' electric lamps
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GB300281A
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A process and apparatus for the volumetric estimation of explosive gases or gaseous mixtures, for instance the eudiometric measurement of firedamp
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GB271891A
|
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Improvements in or relating to electric safety lamps for miners
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GB271890A
|
|
Improvements in or relating to electric safety lamps for miners
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GB254291A
|
|
Improvements in or relating to electric safety lamps for miners
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GB265522A
|
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Improvements in or relating to portable electric lamps for miners
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GB259902A
|
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Improvements in or relating to portable electric lamps for miners
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GB256923A
|
|
Improvements in or relating to portable electric lamps for miners
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