The tunnel was 157 meters long. Nitroglycerin was first used in 1867 to excavate the Hoosac Tunnel in North Adams, Massachusetts. That same year, Swedish physicist Alfred Nobel patented another ...

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For example, a railway may have a tunnel to complete before the road, previously constructed, ca*1 be made available. At the Hoosac tunnel it is estimated tltat, with nitro-glycerin, the opening ...

The tunnel was 157 meters long. Nitroglycerin was first used in 1867 to excavate the Hoosac Tunnel in North Adams, Massachusetts. That same year, Swedish physicist Alfred Nobel patented another ...