274 JRecent Progress in Sanitary Science. 



not observe the occurrence of a greater number of cases of 

 catarrh." The result of a year's observations by the Medi- 

 cal and Scientific Club of Kouigsberg, in Prussia, was to the 

 effect, " That the month of November, during which the 

 spread of catarrhal affections was most extensive, and the 

 month of September, which was notorious for the prevalence 

 of intermittent fever, typhus, cholera, and diarrhoea, exhibi- 

 ted nearly an equal amount of ozone, and, that a sudden 

 and considerable increase in the amount of ozone did not 

 appear to be a cause of the commencement of catarrh of the 

 respiratory organs." This is certainly a very decided nega- 

 tive, but the next observer quoted, Dr. Pfaff, of Plauen, in 

 Saxony, has an equally explicit affirmative result. He con- 

 cludes that, " A large proportion of ozone acts in a mis- 

 chievous manner on diseases of the respiratory organs ; that it 

 favors the development of inflammatory affections, especially 

 tonsilitis, and that the ozone exerts little or no effect on 

 epidemic or other diseases, provided they are not compli- 

 cated with catarrhal affections." Dr. Spongier calls upon the 

 medical practitioners of Europe to test the accuracy of his 

 observations, which were made at Roggcndorf, a village of 

 Mecklenburg. "Just before the commencement of an epi- 

 demic of influenza, no ozone was to be detected. Directly, 

 however, catarrhal troubles set in and every one was cough- 

 ing, an abundance of ozone was manifested. As the disease 

 gradually diminished, so did the indications of this body de- 

 crease." Dr. Heidinreich also found that a strong ozonic 

 reaction, coincided with an exacerbation of catarrhal symptoms 

 and the appearance of pulmonary affections, while a dimi- 

 nution of those took place when it was feeble. Faber, 

 Wunderlich, Schiefferdecker, T. Boeckel, and other observers, 

 believe that there is no connection between the development 

 of ozone and the prevalence of catarrhal affections. The au- 

 thorities at the hospital of Metz, have found that there is a 

 certain relation between the variations in the quantity of 

 atmospheric ozone, and the number of cases of bronchial 



