It has recently been proved by authentic specimens and artificial
cultures of the material transmitted by the Explorer of the U. S.
Department of Agriculture, that the chestnut blight exists in Eastern
China.[6] This fact makes it all the more probable that the beginning
of the disease in this country may have come about by the introduction
of such diseased stock from China or Japan. That new centers of
infection are often started by the introduction of diseased nursery
stock, is a common observation.
[6] Science, Vol. 36, No. 937, p. 825, Dec. 13, 1912.
[Illustration: Winter condition of a chestnut tree with a
blight-girdled top.]