FAMOUS
LIGHTHOUSES
OF AMERICA
MINOT'S LEDGE LIGHT, one of America's most famous wave¬ -swept lighthouses, guards ships against treacherous reefs 61/2 miles southwest of the entrance to Boston Harbor. The first tower at Minors Ledge, an openwork iron pile structure com pleted in 1850, was toppled into the sea by a great storm in 1851. The second tower, built of interlocking granite blocks and completed in 1860, still stands solidly on the ledge.
A f a m i l i a r b e a c o n and safe guide to quality in electrochemicals is the name Niagara Alkali Company, long recognized as a leader in this field of chemical production. Depend on Niagara for quality and good service in Nialk® Liquid Chlorine, Nialk Caustic Potash, Nialk Carbonate of Potash, Nialk Paradichlorobenzene, Nialk Caustic Soda, Nialk TRICHLORethylene, Niagathal® (Tetrachloro Phthalic Anhydride).
NIAGARA ALKALI COMPANY 60 East 42nd Street, New York 17, Ν. Υ.
