National Geographic : 1939 Feb
rnotograpn Dya.Atnlnony atewart A REDWOOD STUMP SPANS TWELVE CENTURIES OF HUMAN HISTORY Big as the side of a bungalow is this cross section of a stump facing away from the root system shown on the opposite page. Because atree adds yearly anew layer of wood outside the old it is possible to correlate events by counting the rings. This tree was 340 years old whenWilliam the Conqueror landed inEngland. Itwas mature when the Magna Charta was signed and venerable when American independence was declared. It fell in 1933. Some coast redwoods aremore than 2,000 years old.