856 METHYL L.EVO-INOSITOL IN A POISONOUS PLANT, 



Inactive-inositol 



from dil. alcohol, or M-ater under 50°C., gave ... crysts. with 2H2O. 



from dil. aleoliol, or water above 50°C., gave ... aiihj'drous cry.stis. 



Dextro-inositol 



from dil. alcohol, or cold water, gave ... ... anhydrous crj'sts. 



from cold water seeded with hydrate crysts. , gave crystal with 2H.,0. 



from hot water, gave ... ... ... ... crysts. with 2H..0. 



L;evo-inositol 



from cold water, gave ... ... ... ... crysts. with 'iH.^O. 



from hot water, gave ... ... ... ... crysts. with 'iH.^O. 



from dil. alcohol, gave ... ... ... ... anhydrous crj-sts. 



Dl-inositol 



from cold water, gave ... ... ... ... anhydrous crysts. 



It is to be pointed out that the inactive and dextro forms give 

 reverse results with the same treatment. Maquenne, in com- 

 paring the dextro- and l^evo-isomers, could always obtain the 

 former from cold water in anhydrous crystals, but was quite 

 unable to obtain the same with the hi^vo form. 



The following results were obtained with the k«vo-inositol 

 from Heterodendron, and are of interest when compared with the 

 figures in the previous table. 



gm. 



1 . Heated at 1 1 0°C. for 1 hour 'oSOo 



2. Dissolved in cold water, dried in desice. at 25^C. for 2 daj^s .. 0'5522 



,, ,, ,, 25°C. for 1 day ... O'ooll 



25°C. for 1 day ... 0*5o08 



3. Dissolved in water at 70°C., crystd. at 70'C., dried in desice. 



at 25°C. for 2 days 0'5678 



at 2o°C. for 1 day 0-5650 



at 15°C. for 3 days 0-5530 



at 15°C. for 3 days 0-5512 



4. Heated at 100°C. for 3 hours ..." 0*5508 



5. Diss, in water, dried in the open at \ai°C. ... ... ... 0'5508 



Inositol ■2H2O requires ... ... ... ... ... 0-5660 



The crystallisation from cold water, therefore, left anhydrous 

 inositol when kept over sulphuric acid, or dried in the open. 



When cr3'stallised at 70'C., and subsequently kept over 

 sulphuric acid for two days, the crystals contained an equivalent 

 of two molecules of water; but since this water was graduall)' 

 lost at the ordinary temperature standing over sulphuric acid, or 



