210 



SALTS. 65. Natnim, 



SALTS. 



6^, NATRUM. Of a caudic tafte, cffervefclng 

 with acidsj with oil forming foap, changing blue 

 vegetable juices green, rendering acid folutions 

 of earths and metals turbid. 



antiquorum. Inodorous, dry, nearly pure. 



Natrum nudum. Syji^ nat. xii. 3. p. 8S. «. r. 



Alcaii orientalc. WalUfyst. 2. p. 61. ». i. 



Alcali minerale. Cronft. Je^. 135. 1. 1. 



Soda, Mineral alkali, SchmeiJ/er miner. 1. p. 166. 



Soda. Tkomjon chem. i. /. 475. 



Natron, Mineral alkali. Kirxvan mneral. 2. p. 6, 



Fotind in China^ BengaU Perfia, Syria, Egypt, South JmericOf 

 Denmark, S-ujitzerland, and Hungars, generally during the 

 fpring and fummer in a (late of whitifh efflorefcent powder, 

 and mofi. ufually combined with a greater or lefs portion of 

 earth, common fait, acid, and various fubftances : it is to- 

 tally foluble in water, and after evaporation runs into 4-fided 

 prifmatic cryllals terminating each fide in a needle-like paint, 

 which on expofure to the air foon moulder into a fnowy im- 

 palpable powder; with quicklime and oil it forms foap, it 

 Crffily melts in the fire, and with filica forms glafs. 



€tcidulare» Inodorous, diflblved in water. 



Alcali miner, in acidulis. Wall. fyst. 1. p.dt,, n. 2. 



Found in the warm and acidulous baths of Seltzer and various 



parts of Germany^ and in the lakes between Alexandria and 



Rofetta. 



murorum. Inodorous, mixed with carbonate of lime. 

 Natrum nudum. Syst, nat, xii, 3. />, 88. n.2. 

 Alcali calcarea. WalL/yft. 2. />. 65. n, 3. i. 

 Aphronitum. Wolfterfd, min, 300. 



2. Natrum marmoris. Syft,naU I. /». 161. «. i. 

 Sal calcarium. //. Oel. 147. 



Found in old walls cemented by linie, and fometimes in marble 

 rocks, elHorefcing like froft, and is not totally foluble in water, 



^volatile. Fetid, mixed with earths and other falts, 



Alcali volatile. Cronft. min. J'e^, i^i, 2, V/alUfyft, 

 Aphronitum fcetens. Wall, 2. /. 66. 71. 1. Halinitron. 

 Volalkali. Kir^wan mineral. 2. p.y. 



Found in various foils, in chalk, fwineftone, argils, and often 

 in the natron ot old walls: its odour origifiates in the am- 

 monia of decayed living bodies. 



