Part 45

M. Margraaf.

Footnote 11:

I have ſome reaſon to believe that the Nevil Holt water does contain ſome of this acid in an uncombined ſtate. W.

Footnote 12:

Opuſcul: vol. II. p. 40.

Footnote 13:

Called Derbyſhire fluor; Corniſh fluor, blue John. W.

Footnote 14:

D. SCHEELE Act. Stockh. 1778.

Footnote 15:

It has been lately obtained in great abundance from bones. W.

Footnote 16:

Opuſc. chem. vol. II. p. 424.

Footnote 17:

De Sale ſedativo naturali, 1778.

Footnote 18:

It is found in a ſeparate ſtate in large quantities in ſome of our mines and wells, and is called the choak damp. In the famous Grotto del Cano too it exiſts tolerably pure. W.

Footnote 19:

D. D. MARGRAAF, WEIGLEB.

Footnote 20:

Opuſc. chem. vol. II. p. 368.

Footnote 21:

MARGRAAF Opuſc.

Footnote 22:

CAVENDISH Phil. Trans. 1767.

Footnote 23:

Dr. Home, in his eſſay on bleaching, ſays it is found in coal mines in this iſland, and a friend aſſures me that he has obtained it from the water iſſuing out of coal pits. W.

Footnote 24: