32 
POriJLAR SCIENCE REVIEW. 
are freely made in the chamber of the cylinder, and the air 
is richly ozonized. In the diagram herewith supplied, the 
apparatus, as it is set up ready for action, is well depicted 
by Mr. Orrin Smith. 
By means of this apparatus I have produced an air which is 
irrespirable except for a brief period, and so active in its 
destructive power that gutta-percha and india-rubber tubings 
are destroyed by merely conveying it. To obviate the mechani- 
cal difficulties arising from this cause Dr. Wood has very 
ingeniously devised a tube of quills, which answers every 
purpose : the quills are held together with sealing-wax varnish, 
the narrow end of one quill being inserted into the wider end 
of another, and so on in a line. 
Such are the various methods by which Ozone is produced, 
and however produced it appears to have the same properties : 
it is, therefore, assumed to be the same substance as derived 
from all these sources, but what it is, — that is still a disputed 
question. 
I shall not trouble the reader with any argument on this 
great subject — it suffices for the physiologist to know that 
there is an active agent, which he may call Ozone, and which 
he can produce at will, — but I may state, in one or two words, 
that, in respect to composition, one class of theorists hold 
Ozone to be simply oxygen in an active state, while others 
maintain that it is a combination of oxygen 'with hydrogen, a 
peroxide of hydrogen. According to my light I should say 
that those who hold for the active oxygen theory have the best 
of the disputation; but I will not press the point further, 
because the object of this paper is not to discuss what Ozone 
is, but what it does in one particular course of action. 
By operating with Siemens’s apparatus, we may discover 
with great rapidity and by frequently repeated experiment, 
the influence of Ozone on both dead and living organic animal 
matter. We may follow these lines usefully. 
On dead matter that has become putrid Ozone acts with 
great vehemence as a deodorizer or purifier. This it effects by 
decomposing the products wffiich emanate from the putrifying 
body, and the effects are the same in the most offensive 
compounds. I could illustrate these facts by numerous expe- 
riments, but one will be sufficient. 
In the year 1854, I placed a pint of blood derived from an 
ox, in a large, wide-mouthed bottle. The blood had coagu- 
lated when it was placed in the bottle, and consisted of two parts 
clot and serum. It was left in this state, exposed to the air, 
until it was quite putrid and the clot was softening : then 
the clot was gently stirred from time to time, until it had 
