Alkalies and their CARBONATEi. 275 



Caustic potash, Pure potash. Hydrate de deutoxide dc potas' 

 siuniy Lapis infernaUs^ Lapis septinis. Kali piiritm. Potassa, P, 

 fiucL, Kali caiisticiniu Evaporate pure potash water till the boiling 

 ceases, and the salt melts smoothly like oil, then pour it out on 

 an iron plate, and cut it into pieces : caustic, but is apt to spread. 

 Composed of* 6 potash, and 1*125 water; equiv. 7*125. 



Nitre fixed by metals, Nitrum a metallisjixatum. Regulus 

 of antimony 4 oz., melt in a large crucible, add purified nitre 

 20 oz. at three separate times, an hour apart ; keep the matter in 

 fusion for some time. Very caustic. 



mineral alkali or soda. 



British barilla. The ashes of Salicornia Europaea calcined 

 into a porous mass. Very poor in subcarbonate of soda. 



Kelp, Varecq. Sonde de Normandie. The ashes of Fucus vesi- 

 culosus, and several other species ; contains scarcely any subcar- 

 bonate of soda, never more than 3 in the 100. 



Smyrna barilla, Cendre du Levant, From Mesembryan- 

 themum Copticum and Salsola kali ; contains about 40 in the 

 100 of subcarbonate of soda. 



Barilla ashes, Spanish barilla, Alicant barilla. Soda Alican* 

 tina, S. Alonensis, Sal alkali, Soda impura, Carbonas sodce impura. 

 From Mesembry anthem um nodiflorum burned with Salsola 

 sativa ; contains about 25 in the 100 of subcarbonate of soda. 



East Indian barilla ashes. From Salsola Indica, S. nudi 

 flora, and S. elata. 



Cape barilla. From Salsola aphylla and S. soda. — Marseilles 

 barilla. From Salsola soda. — Sicili/ barilla. From Salsola tragus. 

 — Teneriffe barilla. 



Blanquette, Sonde d"" Aigaes mortes. The ashes of Salicornia 

 Europaea, Salsola tragus, Atriplex portulacoides, Salsola kali, 

 and Statice limonium: contains about 3 to 8 in the 100 of sub- 

 carlwnate of soda. 



Salicor. Soude de Narbonne. The ashes of Salicornia 

 annua: contains about 14 or 15 in the 100 of subcarb. of soda. 



Alexandria barilla, Roqnette, Rochctta Alexandrina. From 

 Salsola Arabica, with Mcftcmbryanthemum nodiflorum, and 

 Plantago squarrosa. — Soude de Bourde. Very bad, stinking. 



PooN iiKER. A whitish earth, containing much subcarb. of 

 •oda, found in the East Indies. 



Natron. From lakes dried up by the summer's heat. Is a 

 sesquicarbonatc of soda mixed with salt, and sulphate of soda. 

 Imported from Egypt.— 7ro7ia. A similar mineral, imported 



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