2i6 
SALTS- 69. Mirabile. 
ieu7:tosumt 
eubicum* 
fammans. 
genuinum. 
Fixed, not deliquefcing in the air, when dilToIved 
llowly evaporated cryftalHzing into 6-fided prififl* 
terminating at each end in a 6-(ided unequal pyrarnit^t 
efflorefcing, mixed with mould or chalk. 
Nitrum huimfum, nat. xii 3. f. 84. n. i. 
Nitrum inineralifatum. Wall f/H. i. p. 4;. ». i. 
Found, generally in a ftate of white efflorefcence, on rrioift 
walls which arc but little expofed to the action of the fun 
winds, as in wells, grottos, &c. efpecially thofe which fa<^® 
towards the fea. 
Fixed, when dillblved and evaporated concreting iu^®' 
rhombic eryftals. 
Nauwerk CJjem, annal, 1 / 84. 2. p, 3 1 4. 
Found, though rarely, in eaves with the lall, efflorefcing fro** 
the nioilt Tides of walls. 
Evaporating in fmoke when thrown on red hot coals, emit' 
ting an alkaline odour when rubbed together wh^’ 
quicklime, deliquefcing in the air. ^ 
Nitrum femivolatile. Cronff, miner. 38. 
Found with the Nitrum humofum. 
69. Mirabile. of a bitter tafte; not eafil)'^ 
foluble in cold water, and the folution not made 
turbid by a mixture of foda: not effervefeing 
with any acid; expoled to a white heat with 
powdered charcoal producing an alkaline 
phur. 
Of a cooling tafte, cafily melting in the fire, when diftbl'';' 
ed and llowly evaporated cryftallizing into very trani' 
parent unequally 6-fided prifms which moulder in the* 
air. 
Natrum fontan. Tatnrat. Syjl. nat, xii. 3. p. 89. n. 3. d. 
Sal neutrum compofit. WalLjyst. 2. p, 70. «. l. 
Glauber’s fait. Berkenh. autl. 253. 
Glauber’s fait. Kirnnan miner. 2. p. 9. 
Milphate of foda. Schmeijfer mineral. 1. p. 267. 
Sulphat of foda. ’Thomfan them. 2. p. 349. 
Found in many iriineral waters of Britain and other parts o* 
Ewope, fometimes dry, rarely in a cryllallized ftate, fonie' 
times in a ftate of white efflorcfccnce on moift walls, in 
quantities under the furface of the earth in the neigbbourhoq“ 
ef Aftraean, and in lummer at the bottom of lakes : i* ** 
