HC Deb 17 July 1934 vol 292 cc918-9
3. Mr. DAVID GRENFELL

asked the Secretary for Mines whether he will state the number of safety lamps, electric lamps and naked lights used by miners in South Wales coal mines; and whether he has figures to show the extent to which electric lamps have displaced other lights in recent years?

Mr. E. BROWN

As the reply involves a statistical statement, I will, with the

SOUTH WALES AND MONMOUTH.
Safety Lamps in use at 30th June in the Years 1929–1933.
At 30th June. Number of Flame Safety Lamps in use. Number of Electric Safety Lamps in use. Percentage Proportion of Flame Lamps to Total Safety Lamps.
Per cent.
1933 … … … … 48,530 88,016 36
1932 … … … … 51,734 88,194 37
1931 … … … … 58,780 91,678 39
1930 … … … … 67,614 94,086 42
1929 … … … … 69,109 96,193 42
Particulars are not available of the number of naked lights in use.