IIVI)|;<).\VI,A.MIM;-^/,?-|)IsrLrJK)\ATE.S. 11 



l)(j ol)tuiiie(l. One tjuautitativüly examined had a composition 

 corresponding fairly well with that of a compound of (*> niol. of 

 the dianinionium salt with 1 mol. of the i-normal barium salt. 



Molecular Magnitude of TrUodium Hydroxylamine- 

 i/.ß-disulj)honale. 



By Löwenherz's method, the molecular magnitude of the 

 Irisodium hydroxylamine-^9/5-disulphonate has been found to be 

 (anhydrous) 233 and 230.6, whilst OyNSzNas requires 259.35 

 (this Journ. ig, Art. 15, 33). By the same method, the following 

 approximations to the same number have been obtained for the 

 «^9-salt, namely, 269.6, 279.3, and 256.4, using the constant, 32.6, 

 for sodium sulphate found by Löwenherz. The details of these 

 determinations of the molecular magnitude of the «y9-salt are 

 specially interesting (p. 4). Of this salt, .8371, dissolved in 

 40.48 melted Glauber's salt, produced a depression of 0.22° in the 

 crystallising point, corresponding with the mol. weight, 306,2. 

 After solidifying and melting three times, the depression reached 

 0.24° and remained at that, which corres2:)onds with 269.6. There 

 was now added .5848 more of the salt, and the depression due to 

 this addition was at first only .005°, corresponding with a mol. 

 weight of *)416, that is, about 40 times the normal magnitude. On 

 allowing the mixture to solidify and remelt, the depression grew 

 in amount until at the sixth repetition it reached its maximum, 

 corresponding with the simplest formula of the salt. The whole 

 quantity, 1.4219 now caused a depression which gave the mol. 

 magnitude as 279.3. .Vdding now .9026, the additional depression 

 was at first only .04°, corresponding with a mol. weight of 1878 

 which is about 8 times the sim[)le molecule. But, again as 



