90 Mr. J. Cockle’s Note on the Remarks of Mr. Jerrard. 
Now, what do you say to the extraordinary fact, that the anti- 
pode of ozone has these many thousand years been ready formed 
and incarcerated, only waiting for somebody to recognize and 
let it loose out of its prison? <A dark blue species of fluor-spar 
has for years been known by the German mineralogists, being 
distinguished by its property of producing a peculiarly disagree- 
able smell on being triturated. Many conjectures were made 
as to the chemical nature of the odorous matter emitted from 
the spar: chlorine, iodine, and even ozone were spoken of, but 
it turned out to be a different thing. 
M. Schafhaeutl of Munich sent me, a month ago, some hun- 
dred grammes of the said fluor-spar (occurring within the veins 
of a granitic rock at Wulsendorf, a Bavarian village near Am- 
berg), asking me to try my luck in ascertaining the nature of 
the smelling matter; and I think I have fully sueceeded in 
making out what itis. Surprising as it may sound to you, and 
unique as the fact certainly is, that matter happens to be nothing 
but my insulated antozone. ‘ But how do you prove that ?” you 
will ask me. Inthe first place, it smells exactly like © disengaged 
from BaO?. “ But smells are fallacious tests.” They are. You 
shall have another proof that will irresistibly carry conviction 
with it: on triturating the fluor-spar with water, peroxide of 
hydrogen is formed, not in homceopathic, but very perceptible 
quantities. When I first found out this extraordinary fact (I 
think it was on the 17th of November last), I could not help 
laughing aloud, though I happened to be quite alone in my la- 
boratory. I laughed because [ strongly suspected my foe to be 
hidden in the spar, and I broke his mask under water with the 
view of catching him by that fluid. Indeed, it was to me as if I 
had caught a very cunning fox, long sought after, in a trap put 
up for him. To show you that in saying this I have neither 
been joking nor dreaming, I shall send you, as soon as I can, a 
sample of the wonderful spar, with which you may easily satisfy 
your curiosity and convince yourself of the correctness of my 
statenents. I must not omit to tell you that, according to some 
previous experiments of mine, the fluor-spar of Wulsendorf 
contains =;5,th part of antozone—a quantity, as you see, not at 
all homeeopathic. How that subtle matter got into the spar I 
cannot tell. 
XV. Note on the Remarks of Mr. Jerrard. 
By Jams Cocxin, Esq. 
[Concluded from vol. xix. p. 332. ] 
HE sequel to Mr. Jerrard’s important ‘ Essay’ may remove 
the new doubts and difficulties which arise upon his 
‘Remarks,’ and which, numbered in conformity with his para- 
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