30 H £S-S W t> fiü tt H r- *ic * -c 



wa^i added to Uio filtrate, •when a flocculcut substance of quite wliito colour wafl 

 abundantly x^roducod. The insoluble lead comixmnd thus resulted was collected 

 on a " Nutscli " filter with suction, well washed with water, suspended in water 

 and decomposed by liych'ogcn sulpliide. After the decomposition was complete, it 

 was filtered, and well washed with water, and tlien the filtrate was evaiwrated to 

 a small volume in a partial vacuum. The s^tuj) was tlieu extracted with boUing 

 9ii% alcohol and separated into two parts of soluble and insoluble, the former 

 being in-odominate in quantity. The insoluble part of a shghtly dark colour was 

 designated as the residue (II) and preserved in a desiccator as the material for 

 the later investigation. The soluble part was again concentrated to a syrup. 



The piu'ified syrup did not produce any marked crystals even after standing 

 for about one week. Hence, an attem[)t was made once more to clarify the syrup 

 by means of absolute alcohol, i.e. tlio sjTup was extracted many times with a 

 small quantity of absolute alcohol until, after evaporation of alcohol, no more 

 residue was produced, and it was thus separated into two parts, soluble and in- 

 soluble, in absolute alcohol. The extracts were imited and concentrated again into 

 a small bulk. The insolube substance of quite white colour liad a sweetish taste 

 and was preserved in a desiccator as the material for a fiu-ther study, designated 

 as the residue (III). 



When the twice imrified syrup was left untouched for about twenty-four 

 hom-s, it was found thickly laden with fine crystals. A small amount of 95% 

 alcohol was then added to the syrup, mixed, filtered with suction and washed 

 with absolute alcohol and ether. Tlie sugar thus obtixined was perfectly white in 

 colour and left no ash on ignition. After drying over sulphuric acid in a vacuum, 

 its specific rotatory power was determined and foimd to be -1-66.53°. 



For the detenniuation of specific rotatory power, Ü.45Ö1 gi-am of the 



sugar was dissolved in 25 cc. of water and polarized in a tube of 200 mm. 



length. A dextro-rotation of 7.0 on the scale of Schmidt and Haensch half 



shadow polariscope was observed. The specific rotatory ix)wer is 



,^P^ 7^0x03462125.^ +66.53 (at 20°). 

 ^ 0.4551x2 ^ ^ 



The melting point was also determined and observed to be 160°. The specific 

 rotatory power and melting ]K>mt indicates that the sugar at hand is no other 

 tlian sucrose. 



