View of Ferroux’s boring machine with its operating crew. This pneumatic boring machine was used in the cutting of the Gotthard Tunnel and was an improvement on the machine used for the Fréjus Rail Tunnel.
The initial Gotthard Tunnel was 9.3 mi (15 km) long between Göschenen and Airolo, Switzerland. The building started in 1872 and it opened for traffic in 1882.
The caption reads in the original French:
La machine perforatrice Ferroux.