"The result of these experiments
will aid us in deductions as to the
movement of pollen. It is exception
ally light and probably rises to these
elevations with the vaporized mois
ture. Then, being light, it falls
slowly. In dry, warm weather it
ascends."
One of the most noteworthy ex
samples of ragweed pollen movement,
Dr. Scheppegrell said, occurred dur
ing the hurricane which swept the
gulf coast on September 29. 1916.
Charity hospital here maintains a
clinic for hay fever sufferers and the
records show a largo attendance
pritr to the hurricane, but not a one
afterward. The storm had blown
the ragweed to pieces and carried
away the pollen.
