Journal 



OF THE 



NEW-YORK MICROSCOPICAL SOCIETY. 



Vol. IV. APRIL, 1888. No. 2. 



THE PATHOLOGY OF POLLEN IN ^STIVIS, OR 

 HAY-FEVER. 



BY PROF. SAMUEL LOCKWOOD, PH. D. 



{Read December idth, 1887.) 



Certain places in the White Mountains of New Hampshire 

 have become notable as summer resorts for sufferers from 

 ^stivis, or Hay-Fever. A number of these sanitaria lie more 

 or less contiguous to the sources of the Saco river, on the one 

 side, and the sources of the Connecticut on the other. 



When the South winds prevail in either of these long tracts, 

 there is a lowering of the barometer, and at the same time a 

 nervous depression of the subjects of Hay-Fever. There is also 

 another change in the atmosphere, which is then laden with the 

 dust-produce of these valleys. A marked element in this dust 

 is pollen, chiefly that of Rag-weed and Golden-rod, which, 

 especially the former, abounds in the South, in the months of 

 August and September. At such a time the suffering among 



^Explanation of Plate 11. 



Fig. \. — Pollen of Rag- weed. Ambrosia artemisicefolia, L.; size, u'55 X ibW inch. 

 Fig. 2.— Pollen of Golden-rod, Solidago sqtiarrosa, Muhl.: end view, showing spines 



of two lengths, and trilobate depressions ; size, -gl^ X tdbs inch. 

 Fig. 3.— Pollen of S. squarrosa : side view, showing one of the three longitudina 



grooves, which, in figure 2, are indicated by the trilobes. 

 Fig. 4.— a diagram of a group of pollens of S. squarrosa. Two are side views, and six 



are end views. 

 The figures are necessarily diagrammatic. For figures 1, 2 and 3 I am indebted to 

 Dr. Alfred C. Stokes. S. Lockwood. 



