314 On purifying Muriate of Soda. 



already in our possession ; notions more accurate respecting 

 their formation ; — succours still more valuable contributed 

 bv cheniistrv and natural history to rursl and domestic 

 ceconomyj valuable observations in medirlneand precious 

 remedies^ — All these have we this year 16 eiirol in the an- 

 nals of the Institute, as the Romans enrolled the conquests 

 of the republic ; and we have a right to boast in this man- 

 ner: for although all these diseovevies may not have pro- 

 ceeded directly from members of cur body, yet we are not 

 strangers to any of them, since by our diligence and la- 

 bours we have proved their reality. 



XLIII. IntelUgeiKe and Miscellaneous Articles, 



MESSRS. LONDONS* PROCESS FOR PURIFYING MURIATli 

 OF soda'*'. 



JL his process consists in purifying or refining muriate of 

 soda, whether obtained from rock or fossil salt, brine, 

 springs, sea water, or from any other source, by fusion, 

 o; by heat, or calcination; and by the application of soda, 

 its nitrate, sulphate, carbonate, or any other of its com- 

 binations ; potash, volatile alkali, lime, or their sulphates, 

 nitrates, cavbonates, or other combinations; or by the ad- 

 dition of any other material or re-agent that will eftect the 

 decomposition, precipitation, or separation of the whole 

 or part of the earthy or metallic salts combined with the 

 muriate of soda. 



The muriate of soda (common salt) with the necessary 

 re-aii^ents is to be put into a reverberating furnace, and such 

 a dci^ree of heat applied as will fuse the muriate of soda, 

 which being kept in fusion a sutficient length of time, the 

 earthy and metallic parts arc decomposed, precip-hated, or 

 separated ; and the purified nmriate is drawn off or taken 

 out into proper receiving vessels as long as it continues to 

 come off clear, leaving the sediment or impure residue at 

 the bottom of the furnace. 



The muriate of soda thus prepared may be broken into 

 any sized grains or pieces required. 



If the muriate of soda be not required in that state of 

 purity in which it may be obtained by the .above process, 

 the expense of re-agents need not be incurred. By mere 



• Extracted from tkeir specifkatioii, a patent having been granted for 

 tlieir process. 



fusioii 



