ON DUST AND DISEASE. 



193 



local application of quinine. 1 Professor Busch, of 

 Bonn, authorises me to say that he succeeded in two 

 cases of ' catarrhus sestivus ' by the same method : a 

 third patient was obliged to abstain from the use of 

 quinine, as it produced an unbearable irritation of the 

 sensible nerves of the nose. In the autumn of 1872 

 Helmholtz told me that his fever was quite cured, and 

 that in the meantime two other patients had, by his 

 advice, tried this method, and with the same success. 2 



1 Of. Virchow's 'Archiv.' (1870), vol. li. p. 176. 



2 Prof. Helmholtz, whom I had the pleasure of meeting- in 

 Switzerland last year, then told me that he was quite convinced 

 that hay fever was produced by the pollen afloat in early summer 

 in the atmosphere. 



TOL. I. 



