CRYSTALLIZATION OF SODIUM IODIDE 309 



quite so readily as with the methyl alcohol. The analysis 

 gave 64.29 per cent I; calculated for NaI.C 2 H 6 O, 64.91 per 

 cent. This, therefore, seems to be the formula of the addition 

 product with ethyl alcohol. 



Normal propyl alcohol dissolves nearly one-third of its 

 weight of sodium iodide and, on evaporation at low tempera- 

 tures, deposits crystals which appear to have the formula 

 5NaI.3C 3 H 8 O, as two distinct preparations gave 68.26 per 

 cent, and 68.22 per cent of iodine, against 68.27 per cent re- 

 quired by theory. Apparently, therefore, the molecular pro- 

 portion of alcohol assimilated decreases as the series ascends. 



