213 



Carbohydrates. 



PBOPENYL TRISTEABATE. C 3 H 6 (C 18 H 3 j0 2 ) s . (Stearin.) 

 a. Cocum butter. 



Note. This substance contains more than half its weight of stearin, 

 the remainder consisting of olein. 



PYROGALLOL SERIES. CnHj,,-,. 

 453. PTEOGALLOL. (Pyrogallic Acid.) 

 a. Silky acicular crystals. 



TETRATOMIC ALCOHOLS. 



464. ERTTHRITE. C 4 H 6 (H0) 4 . (Erythromannite, Phycitc, Ery^ 



throglucin.) 

 a. Colourless prismatic crystals. 



PENTATOMIC ALCOHOLS. 



465. QOERCITE. C 6 H 7 (HO) 6 . 



a. Transparent monoclinic crystals. 



Note. Both these alcohols are saccharine substances. See Fownet, 

 Chemistry, p. 628-630. 



HEXATOMIC ALCOHOLS. 



466. MANNITI:. C 6 H 8 (H0) 6 . 



a. Prismatic colourless crystals. 



b. A cone of mannite, from Tuscany. 



Note. Specimen 6 was presented by Mr. J. M. Broad, who brought it 

 from Florence. 



CARBOHYDRATES. 

 CELLULOSES. C^H^O,. 



467. STARCH. C 18 Hgo 15 . (Fecula, Amidin.) 



a. Obtained from maize. 



468. DEXTRINE. C 12 H^ 10 . (British Gum.) 



a. Fawn coloured powder. 



b. White powder. 



Note. Specimen a yields a better mucilage than 6. 



469. INULIN. C 18 H SO O 15 . (Alantin, Sinistrin, Menyanthin, Dahlin, 



Syiiantherin.} 

 a. Obtained from dandelion root. 



470. CELLULIN. C 18 H^ 15 . (Cellulose.) 



a. Cotton. 



Note. The hairs surrounding cotton seeds consist of nearly pure 

 cellulin. 



