2$ A SYSTEM OF 



mums faturata. Sal Ammoniacum fixum natu- 

 rale< 



This is found, 

 i. In iea water. 

 2. In fait pits. 



It is formed in great quantities at the 

 bottom of the fak-pans of the fait works. 

 It attracts the moifture of the air *. 



SECT. XXII. 



JDv Calcareous Earth united with the inflam- 

 mable fubfbnce, 'terra calcarea phlogifto 

 fftixta i feu impregnata. 



Thefe have a very offenfive fmell, at leaft 

 when they are rubbed, and receive their 

 colour from the phlogifton, being dark or 

 black in proportion as it predominates. 



SECT. XXIII. 



1, Calcareous Earth mixed with phlogifion 

 alone, Terra calcarea phlogifto fimplici mix- 

 ta< Lapis fuillus^ Foetid Hone and fpar, 

 or fwine flone and fpar. Perhaps the fmell 



* Perhaps fonie kinds of limeftones may exift that contain 

 Sftore or lefs of the acid of common fait, though they are 

 not yet difcovered. It is almoft incredible what quantity of 

 fech diffolved calcareous earth is contained in fea-water ; and 

 from which the teftaceous animals or ihells get the materials 

 for their fhells or coverings. Perhaps Nature has a particu- 

 lar and fecret method of producing a mineral alcali out of 

 die calcareous earth, and has thus laid this earth, as well as 

 the acid of common fait, together in the water, in order to 

 combine them by degrees, and produce the common fah. 



coliir and particular to that fmall foot of ground, and not found any 

 ^here elfe in the world) fibrous, and always accreting in radiations like 

 a iUt on the Seutaiia ; thence called Stella Septarii. D. C 



of 



