Clarence Hall

· 7 obras en el catálogo

Obras

HHeavenly Pearls

Heavenly Pearls

CCoal-mine accidents

Coal-mine accidents

IInvestigations of fuse and miners' squibs

Investigations of fuse and miners' squibs

MMagazines and thaw houses for explosives

Magazines and thaw houses for explosives

PPermissible explosives tested prior to January 1, 1911 and p

Permissible explosives tested prior to January 1, 1911 and precautions to be taken in their use

TThe selection of explosives used in engineering and mining o

The selection of explosives used in engineering and mining operations

Investigation of detonators and electric detonators