55 



The corresponding salts of potass and soda crystallize in pris- 

 matic groups ; they are anhydrous, and their respective formulas are 



KO, HO, C,, H, O3, 

 NaO, HO C^2 H2 Og. 



He proved the non-existence of neutral alkaline salt, — but shewed 

 that both neutral and acid salts are formed with all the alkaline 

 earths. 



The acid lime-salt crystallizes from boiling water in transparent 

 rhombs, whose composition is expressed by the formula 



CaO, HO, Cj^H^ Og + Taq. 



The 7 aq. are expelled at 250° Fahr. ; the neutral salt of lime is 

 insoluble in water, and its constitution is 



2 CaO, C12 H2 Og, 2 HO + 5 aq., or 

 2 CaO, Cj2 H2 Og, 2 HO + 11 aq., 



according as the fluids from which it is deposited are more or less 

 dilute ; the aq. is driven off at 250° Fahr. 



The bicomenate of baryta crystallizes from hot water in transpa- 

 rent rhombs ; their composition is 



2 (BaO. HO, Cj2 H^ Og) + 13 aq. 



The 13 aq. are lost at 212° Fahr. ; the neutral barytic salt is in- 

 soluble in water, and has the formula 



2 BaO, C12 H2 Og + 2 HO + 8 aq. 



The 8 aq. are expelled at 250° Fahr. 



The bicomenate of magnesia crystallizes from water in crystals 

 very like ferrocyanide of potassium ; their composition is 



MgO, HO, Cj2 H2 Og, 2 HO + 6 aq. 



The 6 aq. being driven off at 240° Fahr., the neutral magnesia 

 salt is insoluble in water, and has the constitution 



2 MgO, Cj2 H2 Og, 3 HO + 8 aq. 



The 8 aq. are lost at 212° Fahr. 



After making a few remarks on sorne other salts, the author pro- 



