OXIMIDOSULPHOXATES OR SULPHAZOTATES. 35 



from wliicli it will l)e seen tliat liis sulphur is about one-tenth too low 

 for this formnlü. one wliich is besides improbal)le from the fact of the 

 lead in it being- wholly eomlnned with the oximide rndieal. 



(7) EKjlit-iiuitlis normal Innlyoxij-lrad soiliinn o.rimidosiiljilionafe, 

 (I-IOPb)ÄGH(NS,0;),, 14H,0.— Concentrated solutions of two mois, 

 of the normal sodium salt and one mol. of normal lead acetate are 

 mixed together and left, protected from the air, till crystallisation 

 occurs, when the solution becomes filled, or ])artlv tilled, with minute 

 crystals forming with it a soft magma. The crystals are drained 

 from their mother-liquor and pressed between porous tiles. Thev are 

 efflorescent and are dissolved and decomposed by water. Two 

 quantities were prepared and analysed, the one more efHoresced rlian 



the other. Calculation A is for 14 Aq. and P. for 10 Aq. : 



A p, 



Ca]c. Foun.l. Calc. Fonud. 



Lead i>i)-:',S 21)-:n 80-97 U'?y2 



•"Sodium !)-79 9*69 lO'Si^ 10-05 



Sulphur 13-n;] 13-7". 14-8(i 14-35 



This salt, like tlie potassium .^:ilr. r-Au lie formulated as a normal salt, 

 (HOPh)Pliîsra«(Î^^S,0,),, 15 HA), or as an oxy-lead salt. (OI^b,)XaJl 

 (XSoO;),,, but with water of erystallisation. The mother-liquor of tlie 

 crystals rontains much disodium oximidosulphonate : — 



4]Sra3XS,0, + 2 Pb(OÄc), + 2hhO - (H0Pb),N"a,H(NS,0,)3 + 4XaOÄc 



+ Xa,llXS,(),. 



(N) Xonnal iliammonium hjidm.rii-h'ml ariniidosulplionate, FIOPbAm., 

 iSTSj)-. — A normal stilt with one atom of the livdroxy-lead radical to 

 Uxo of ammonium has not been isolated in the pure state, but can be 

 got in solution aluKist pure, and the solution can be evaporated in a 

 desiccator to dryness with the loss of a small traction otdvofits 

 ammonia. Xormil hydroxy-lead oximidosulphonate (2) is pre- 



