Columbia subject headings:
Charities--New York (State)--New York.
Mines and mineral resources--United States.
New York (N.Y.)--Description and travel.
Railroads--United States.
United States--Description and travel.
Harvard subject headings:
Charities--New York (State)--New York
Mines and mineral resources--United States
New York (N.Y.)--Description and travel
Railroads--United States
United States--Description and travel.
Princeton subject headings:
Mines and mineral resources--United States.
New York (N.Y.)--Benevolent and moral institutions and societies.
New York (N.Y.)--Description and travel.
Railroads--United States.
United States--Description and travel.