File:Interstate medical journal (1919) (14577467049).jpg

Identifier: interstatemedica2619unse (find matches)
Title: Interstate medical journal
Year: 1919 (1910s)
Authors:
Subjects: Medicine
Publisher: St. Louis, : Interstate Medical Journal
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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of the older text-books as ahayfever plant, but it is harmless. linated, (2) very numerous, (3) the flowers are inconspicuous,without bright colors or scent. Flowers that are fragrant or have bright colors are fertilized byinsects, and their pollen is not in the air as in the case of the hay-fever weeds, which are fertilized by the wind, and their pollen may 3Hayfever and Its Prevention. Wm. Scheppegrell (U. S. Public Health Reports,July 21, 1916). 132 INTERSTATE MEDICAL JOURNAL therefore reach the nostrils of hayfever subjects. This does notmean that the pollen itself of flowers may not be irritating to sensi-tive nostrils. In fact, the pollen of the golden rod, daisies, and manyother flowers contain a substance which may produce a reactionin sensitive subjects. These pollens, however, are not found in theair, as in the case of hayfever weeds, so that the irritation can becaused only on direct contact with these flowers. In the case of the golden rod, which generates more pollen than
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Fig. 4.—Field Daisy. It is fertilized by bees and butterflies, and its pollen is never found in the air. most insect-pollinated plants, a room may be infected by placingthese around in large numbers. Under normal circumstances, how-ever, the pollen of the golden rod or other bright flowers are neverfound in the atmosphere. These facts have been substantiated by a special apparatus knownas the atmospheric-pollen plate,4 by means of which the variouspollens found in the air may be detected and identified by the micro- 4Hayfever and Hayfever Pollens. Wm. Scheppegrell (Arch. Int. Med., June,1917). Scheppegrell: Harmless Flowers and Hay fever Weeds 133 scope. The pollen is tested either by direct application to the nos-trils of hayfever cases, or by injecting the extract of the polleninto the skin. The latter is a delicate test that is as reliable as theculture test in diphtheria.5 The following is a list of-the harmless flowers that have beenblamed for hayfever; also of the common weeds

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