Ozone and the Atmosphere. 195 



customary methods, I prepared a number of ozonoscopic pa- 

 pers, with pure materials, after the formula of Osama, and 

 during the summers of the years 1876 and 1877, in the Adi- 

 rondack^, and during the rest of this period, in Hoboken, 

 made regular observations. At Hoboken the results were 

 negative, an ozone reaction being obtained on rare occasions 

 only, and then in the most feeble and undecided manner. On 

 the contrary, in Keene Flats, N. Y., the days were few in 

 which the ozonoscopes were unaltered ; usually they were 

 decidedly affected, and sometimes to a degree most striking. 

 The point in the Keene Flats, where the observations were 

 conducted, was about 700 feet above sea-level, the surrounding 

 vegetation mostly deciduous, the population and ' dwellings 

 though scanty, not inconsiderable. Even more interesting 

 were the results during the following summer, 1877, a 4 ; a point 

 near the upper end of Upper Saranac Lake. This was located 

 at a much higher altitude than the foregoing, entirely isolated 

 by miles of primitive forest from any other dwellings. The 

 woods abounded in hemlocks, pines, larches, spruces, and were 

 often redolent with odors of the balsam. Owing to a supposed 

 virtue in these resinous-smelling woods, large numbers of pa- 

 tients, especially those suffering from pulmonary diseases, are 

 sent by the physicians of ISTew York and other large cities, to 

 this portion of the Adirondaeks. Bearing in mind that the 

 beneficial effects are supposed to be due entirely to the atmo- 

 sphere—not to any mineral waters, or peculiarities of regimen, 

 exercise, or occupation — one of these sanitariums, like that on 

 St. Kegis Lake, would afford an opportunity of testing some 

 disputed points concerning the effects of a varying constitution 

 of the atmosphere on different diseases. 



Certainly the intelligent selection of an appropriate sanita- 

 rium, is a duty frequently devolving upon the physician, but 

 oae which at the present time he can in many cases only im- 

 perfectly perforin, from the lack of positive knowledge. 

 Vague impressions or reports can never take the place of atmo- 

 spheric analysis ; they bear a similar relation to it with that 

 which the ancient foretelling of the weather does to the 



