176 OZONE AND ANTOZONE. 
3. At the three observatories the curves designating the proportion of ozone 
were essentially the same. 
4, The curves for temperature were also identical. 
5. At observatory No. 1 the quantity of ozone was znversely proportional 
to the number of deaths, while in observatory No.2 this proportion was a 
direct one. 
Bineau detected ozone but seldom in the air of Lyons, although he observed 
it always in the air of the neighboring country. He attributes the deficiency in 
the city to the action of organic matter in the air. 
Pless and Pierre discovered 0.02 millegramme of ozone in 255 litres of at- 
mospheric air. 
Zenger found in twelve experiments from 0.002 to 0.01 milligramme of this 
body in 100 litres of air. 
R. Angus Smith ascertained that the air of Manchester did not react with 
ozonoscopic paper, nor was there any reaction in the country when the air had 
first traversed the city; which he attributes to the absorption of ozone by the 
products of combustion, (antozone ?) arising from the large amount of coal burned 
in the city. 
C. Kosmann ascertained that in Strasburg, and at a short distance from the 
city, there was more ozone in the air of the country than in that of the city. 
In the city, the ozone maximum occurred in the daytime; in the country, at 
night. He found also, by the action upon Schoenbein’s test paper, that the 
green portions of all plants exhale ozone. 
Mr. Carey Lea discovered that the growth of plants is retarded in an atmo- 
sphere strongly impregnated with ozone. 
A. Poey found that in the city of Havana the ozone reaction diminished 
with the elevation, while in the country the reverse was observed. He also 
discovered that the moisture of the atmosphere influenced the amount of ozone. 
I ascertained that the air of the public grounds in Washington yieided, at 
night, abundant evidence of ozone, while the atmosphere of the streets of the 
city, observed at the same time, indicated an absence of this gaz. 
Dr. W. B. Rogers found that the air passing over Boston was deprived of 
its ozone by the emanations from the city. 
M. Hozeau, of Rouen, inferred, from a series of observations which extended 
over four years, that the atmospheric ozone is least in February, begins to in- 
crease in March, and reaches its maximum in May and June, after which month 
it diminishes to its minimum in February. 
J. Boehm has given the results of four years of regular observations of ozone, 
made in the city and environs of Prague. His ozonoscopic paper was observed 
and changed at 7 a. m. and 7 p. m., the proportion of ozone being determined 
by the depth of shade of the color produced. He found that the ozone bears 
no relation to the relative humidity, rain or thunder storms, clouds, &c., but is 
intimately connected with the force and direction of the wind, which was gen- 
erally from the west when the phenomenon of color was observed. The reason 
of this fact is the relative position of the observatory to the city of Prague, so 
that all easterly winds passed over a thickly-settled portion cf the town, by the 
emanations of which they were deprived of their ozone. 
in the country and suburbs, Boehm found ozone constantly present. With- 
out expressing a decided opinion upon the relation of ozone to health, this 
physicist calls attention to the fact that in Koenigstadt, a place not particu- 
larly noted for its salubrity, he obtained as decided reactions of ozone as upon 
the healthiest mountain, and that the coloration of the test paper is more de- 
cided in Vienna, a city noted tor its lung and typhoid fevers, than in Prague, 
which is ranked justly with the healthiest towns. 
Irom what is known at present respecting “antozone,” it would seem that 
this body plays an important part in depriving the atmosphere of ozone. 
