Yazar
Harold Hayward Clark
14 cilt bulundu.
Cilt sonuçları
The electrical section of the Bureau of mines
Harold Hayward Clark · Govt. print. off.
12 sayfa · 1911
Electricity in mining / United States / United States. Bureau of Mines
Ignition of gas by standard incandescent lamps
Harold Hayward Clark · Govt. print. off.
Sayfa sayısı yok · 1912
Incandescent lamps / Mine lighting / Testing
Safety electric switches for mines
Harold Hayward Clark · Govt. print. off.
Sayfa sayısı yok · 1913
Electric switchgear / Electricity in mining
Shot firing in coal mines by electricity controlled from outside
Harold Hayward Clark · Govt. Print. Off.
36 sayfa · 1915
Coal mines and mining / Electricity in mining
Suggested safety rules for installing and using electrical equipment in bituminous coal mines
Harold Hayward Clark · Govt. print. off.
36 sayfa · 1916
Coal mines and mining / Electricity in mining / Safety measures