106 



Proceedings of the Royal Irish Academy. 





Theory 



for C012O19, 11 HoO. 



Found. 







grains. 



grams. 



0H2 





•1218 



■1255 



C01301, 





■6236 



•6255 



CosOi 





•5940 

 Percentage. 



•5975 





Theory 



forCoi20i9, IIH3O 



Found. 



OHo 





16-34 



16-83 



C010O19 





83-65 



83^90 



On attempting to prepare I^iaOg in the dry state by precipitating, 

 ■washing, and drying in vacuo, I found that the moist precipitate gave 

 off oxygen as soon as the liquid in which it was precipitated was re- 

 moved. The moist precipitate was allowed to stand some days, and 

 then left over the air pump for about a week, in order to allow time 

 for this change to be complete. Owing to some interruption, I have 

 as yet had time to prepare only one sample by this means. The results 

 of the analysis agree closely with the formula NisOn, 9 H2O, one-ninth 

 of the water being lost at 100°C. 



Dried over H-SO 



Dried at 100°C 



Oxide taken. 



Theory of Iodine for 

 NisOii, 9 H2O. 



Found. 



grams. 



grams. 



grams. 



;0i -1705 



•1607 



•1661 



■2012 



•1896 



•1895 



•2375 



•2238 



•2243 



Oxide taken. 



Theory of Iodine for 

 MsOii, 9 H2O. 



Found. 



grams. 



grams. 



grams. 



!. -2080 



•2005 



•2026 



The water in this oxide was determined by igniting the oxide in a 

 platinum boat in a combustion tube, and weighing the water lost by 

 means of a calcium chloride tube. 



Oxide taken, 

 grams. 



•8723 , 



Theory for 

 NigOn, 9 H2O. 



•1748 grm. OHj 



Found, 

 grams. 



•1775 



OHo 



Per Cent. 

 20^039 



20^34 



