LSE4095502 Brunton machine for tunnel digging in soft rocks - in 'The new conquests of science: electricite' by Louis Figuier, sd by Unknown Artist, (19th century); Private Collection; (add.info.: Brunton machine for tunnel digging in soft rocks - in ??s??? The new conquests of science: electricite?????? by Louis Figuier, sd); Photo ?? Leonard de Selva; out of copyright.