232 Intelligence and Miscellaneous Articles. 



On decomposing the formula as follows, the loss of twelve equi- 

 valents of water represents 22 per cent, of the weight of the salt — 



2CsH2 08,Sb2 03, 12H0. 



On pouring alcohol into a concentrated solution of the acidulous 

 tartrate of antimony, a precipitate is obtained which, when dried at 

 320° F., yielded 16*4 of carbon and TS of hydrogen. The compo- 

 sition of this salt is represented by the formula C^ H'^ O^, Sb^ O^, HO, 

 which requires 17*2 of carbon and 1 of hydrogen. The salt which 

 M. Peligot analysed contained a little more water than the quantity 

 required by this formula, but not enough to allow of the addition of 

 another equivalent. 



Acidulous Tartrate of Antimony and Potash. — This salt was de- 

 scribed by M. Knapp, who obtained it by mixing solutions of tar- 

 taric acid and tartarized antimony. The salt which was analysed by 

 M. Peligot was in very regular crystals. It yielded — 



Carbon 19-5 18-7 



Hydrogen 2-7 2*7 



Sesquioxide of antimony 3 TO 



The formula C'^ H* O'^, Sb^ O^, KO, 8H0 represents its composi- 

 tion. It gives — 



Carbon 19-1 



Hydrogen 2*3 



Sesquioxide of antimony . . 30"5 



According to M. Knai)p it contains one equivalent less of water. 



Oxalate of Antimony. — M. Peligot prepared this salt by four pro- 

 cesses : — 1st, by boiling in a solution of oxalic acid oxide of antimony 

 prepared from the chloride by carbonate of ammonia ; 2nd, by treat- 

 ing the powder of Algaroth with oxalic acid ; 3rd, by pouring hydro- 

 chloric acid into a hot solution of the double oxalate of potash and 

 antimony ; the oxalate of antimony precipitates in the state of a 

 crystalline powder ; 4th, by adding oxalic acid to a solution of the 

 same double salt. 



The oxalates of antimony obtained by these processes are similar 

 in composition. The author attempted, but in vain, by varying the 

 proportions, to obtain other compounds of oxalic acid and oxide of 

 antimony. This salt is crystalline and insoluble in water. It is 

 decomposed by boiling water into oxalic acid, which dissolves, and 

 sesquioxide of antimony- 

 Its composition is represented by the following formula, : — 

 Calculated. Experiments. 



, ^ . 



C-* 300-0 10-2 10-1 10-6 10-6 



06 600-0 20-6 



Sb203 .... 1912-9 65-4 66-7 65-6 



HO 112-5 3-8 3-8 4-5 40 



2925-4 100-0 



Double Oxalate of Potash and Antimony. — The preparation and 

 analysis of this salt are very difficult. The salt obtained by M. Pe- 



