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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: J Allergy Clin Immunol. 2015 Jul;136(1):3–13. doi: 10.1016/j.jaci.2015.03.048

Fig 1.

Fig 1

The Resort at Bretton Woods, which was recognized before 1900 as a retreat for hay-fever suffers during the ragweed pollen season [A]. A map of the pollen free areas in the White Mountains published in the 1870s [B]. The apparatuses used by Charles Blackley in his pollen counting experiments in 1872 [C]

Attribution: Panel A: Mount Washington Hotel Resort Bretton Woods New Hampshire

By user Buddymydog1972. Licensed under CC BY 2.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Mount_Washington_Hotel_Resort_Bretton_Woods_New_Hampshire.JPG

Panel B: Autumnal catarrh (hay fever), map of White Mountains 1872 By user Fæ Licensed under CC BY 2.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Autumnal_catarrh_(hay_fever),_map_of_White_Mountains_1872_Wellcome_L 0040001.jpg

Panel C: From book “Experimental Researches on the Causes and Nature of Catarrhus Aestivus”, C. H. Blackley, 1873. ISBN 1-871395-00-3.