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Sir Humphrey Davy in 1815.
sir humprey
The Davy lamp's flame went out when miners got to a spot where there was dangerous gas. Previously, canaries were used to do these jobs.
Humphry Davy
for searching mines
It saved millions of miners lives. It also reduced the deaths of billions of miners.
miners safety lamp Which was to be known as "The Davy Lamp"
Sir Humphry Davy
sir humpherry
Sir Humphrey Davy in 1815.
For information about the Davy safety miners' lamp see the related link below.
no is not
He devised the lamp
sir humprey
1815
Plug it in plug it in.
The Davy lamp's flame went out when miners got to a spot where there was dangerous gas. Previously, canaries were used to do these jobs.