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Keywords:
TUNNELS,
RAILWAYS,
RAILROADS,
RIVERS,
TUBES,
LININGS,
REINFORCEMENT,
REINFORCED,
CONCRETE,
COMPRESSED,
AIR,
UNDERPINNING,
RAPID TRANSIT,
SILT,
HUDSON RIVER,
MANHATTAN,
NEW YORK,
HUDSON,
USA,
UNITED STATES
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© Thomas Telford and ICE
1910
