A novel safety lamp now used in some mines abroad can be lighted without being opened. It is not closed in any special way, like otl\er lamps, but its v. hi. is provided with a cap that is forced down by a spring—instantly extinguishing the light if it in opened,
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Bibliographic details
New Zealand Mail, Issue 1314, 6 May 1897, Page 9
Word Count
50Page 9 Advertisements Column 1 New Zealand Mail, Issue 1314, 6 May 1897, Page 9
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