APPENDIX B 267 



j3. Soluble in saturated solution of common salt only 

 after treatment with alcohol : castor-oil plant, walnut. 

 In all cases a mass (globoid) of mineral matter remains be- 

 hind after the solution of the grain : this is soluble in acetic 

 acid. The sections should be examined in alcohol. 

 Starch-grains. 



i. Coloured blue with solutions of iodine in presence of 

 water. 



ii. They swell in solution of potash, 

 iii. They swell in water above 65 C. 

 iv. They swell in dilute sulphuric acid. 



v. They swell and are coloured blue with iodine in chloral- 

 hydrate. 



vi. They stain pink in corallin-soda solution. 

 Inulin. 



i. Soluble, but not readily, in cold water, 

 ii. Precipitated as sphere-crystals on extraction of water by 

 alcohol or glycerine. 



iii. Not appreciably coloured with iodine, 

 iv. Soluble, without colouration, in potash. 

 v. Coloured an orange-red with alcoholic solution of orcin, 

 after warming with hydrochloric acid. 

 Grape-Sugar. 

 i. Soluble in water, 

 ii. Less soluble in alcohol. 



iii. Gives a bulky yellow precipitate with Fehling's solution. 

 Cane-Sugar differs from the above in giving no precipitate 

 with Fehling's solution. 

 Asparag}n. 

 i. Soluble in water, 

 ii. Precipitated by alcohol. 



iii. Distinguished from other bodies which give the above re- 

 action by insolubility in a saturated solution of asparagin. 

 Fixed Oils. 



i. Coloured black with osmic acid, 

 ii. Saponified more or less readily by potash, 

 iii. Soluble in ether, 

 iv. Stained pink by alkanna. 



