4 
102 Correspondence of J. Nickles. 
set aside the. opinion of Berzelius that the presence of fluorine 
in the bones is purely accidental and not in any case a necessary 
ingredient. If we wish other proof of the necessity of recon- 
sidering the conclusion of this illustrious chemist, we have them 
in the following facts: that fluorine exists in the bile, in the 
albumen of the egg, in gelatine, in urine, in saliva, in hair; in @ 
word, the animal organization is penetrated by fluorine and it 
may be expected to be found in all the liquids which impreg- 
nate it. ’ 
In view of these facts, which I have verified with exactness 
and all possible care, it is evident that fluorine plays in the blood 
and other liquids of the system a physiological part. Its absence 
or its diminution must constitute of itself a state of disease, a 
ecies of chlorose from the absence of fluorine, analogous to the 
chlorose from the absence of iron. This disease may be detectec 
perfect health or from healthy children. 
On another time I will make known the simple process by 
means of which I have been able to recognize the presence of 
fluorine in all kinds of substances. 
~ Nancy, Oct. 30, 1856, y, 
sd 
- 
Art. X1V.—Correspondence of M. Jerome , Nickles, dated Parts, 
August, 1856. pe 
after giving up the last proof-sheet of his Traité de Chimie Orga a 
in con- 
sequence of an acute peritonitis, he died at Strasbourg, where he ‘oceupied 
to 
He had acquired some notions of chemistry at the gymnasium of Stras- 
bourg, where he had studied, and often applied Simeslt to questions 
- ® See the biography of Laurent in this Journal, Aug, 1883. ° 
