20191.
Hudson Tunnel.
Archibald, David Gray
20192.
Construction in NYC.
20193.
West 31st Street.
20194.
Shaft, Jersey City, Hudson Tunnels, Sept. 16, ’04.
20195.
Looking West from Power House stacks, L.I. City.
20196.
Working Air Lock of Hudson Tunnel.
20197.
Method of Handling Tunnel Segments.
20198.
At Weehauken Shaft.
20199.
In motion at shaft house.
20200.
Rock work for tunnel.