170 Intelligence and Misceliames. 
American Philosophical Society, the results of my experi- 
ments were noted in their minutes, and to these Mr. Nuttall 
being a member of that Society, had free access. From 
the sources abovementioned, he could, in 1822, correct the 
results, which he had laid before the Academy of Natural 
Sciences in 1821, and thus pretend, that he anticipated me 
as early as 1820. He pretends that the Fluoric acid, in 
the Condrodite, is accidental, without informing us of | 
quantity, or of the method which he followed to detect it. 
did he neglect to publish his analysis in detail? The 
subject was worthy of such notice, more especially as the 
Fluoric acid, in this mineral, had escaped the sagacity of the 
celebrated Berzelius. To every Chemist, the error of Mr. 
Nuttall’s statement must be evident, because the 4.086 per 
100 of Fluoric acid, which I obtained from this mineral, must 
be an essential, and not an accidental constituent, otherwise 
we cannot account for the saturation of the bases, which 
enter into its composition. It was the want of the knowl- 
edge of the presence of this acid, that forced Professor 
Berzelius, to resort to a peculiar formula, (formule pariticu- 
liére) founded on the principles of definite proportions, 
to represent the condrodite, in his system of Mineralogy, 
as Silicate of Magnesia.* ~ 
Mr. Nuttall was mistaken when he told us that “ Haiiy 
referred the Condrodite to the peridot. On the contrary, 
the celebrated crystallographer remarks, that although, 
from an analysis of this mineral, made by Berzelius, the 
results were similar to those afforded by the peridot, they 
cannot be referred to the same species. The following are 
the words that Hatly employs, when he refers to the analy- 
sis of Berzelius. “On en avait méme fait analyse, dont 
le resultat se rapprochait beaucoup de celui gue donne le 
peridot. Mais ayant entrepris déxaminer la structure de 
ces cristaux, je trouvai que leur division mécanique con- 
duisait 4 un prisme rectangulaire & base oblique, ce gui les 
rendait incompatibles dans une méme espece, avec le peridot 
qui a pour forme primitive un prisme droit.”t 
* Annales des Mines, Tome 6, p. 528. 
t Journal of Science and Arts, Vol. 5, p. 245. 
t Annales des Mines, Tome 6, p. 528. 
