Phj'siologie. o\7 



sie hauptsächlich die Eigenschaften des gelösten Anthocyans der 

 Weigert'schen Gruppe Weinrot. Die Kristalle werden auch in den 

 Grundgewebezellen der rotgefärbten Teile der Inflorescenzstiele 

 angetroffen. Grevillius (Kempen a/Rh.) 



Pond, R. H., The Incapacity of the Date Endosperm for 

 Self-digestion. (Ann. of Bot. p. 62—78. Jan. 1906.) 



Seeds carefully removed from the fruit of Phoenix dactylifera 

 were emploj^ed. The embryo was completely extracted and the 

 tannin-containing seed-coat was separated. 



It was found that the endosperm contains reducing sugar: the 

 endocarp contains tannin; the only proteid present in significant 

 amount is the nucleo-proteid. 



The aqueous extract of the resting endosperm is not autohydrolytic 

 nor is the endospermpowder capable of autodigestion. 



There is no evidence of the development of an enzyme in the 

 endosperm during germination no do degermed endosperms show 

 any corrosion after a long period under conditions the most suitable 

 for enzyme action. 



The conclusion is that the endosperm of Phoenix dactylifera is 

 incapable of self-digestion. E. Drabble (Liverpool.) 



Robinson, H. H., The gum of Cochlospermwn gossvpium. (Journ. 

 Chem. Soc. LXXXIX. p. 1496. Oct. 1906.) 



The gum of this plant is sold in the Indian bazaars as a Substitute 

 for tragacanth like the gum of Steradia iirens, this gum gives off 

 acetic acid slowly in contact with moist air. It is free from starch 

 and jnelds as stable acid C23 Hg^ O2, for which the name gondic 

 acid is suggested. By treatment with sodium hydroxide Solution in 

 the cold the acetyl group is removed and a gummy substance with 

 acid properties is obtained. The name c.-cochlosperminic acid is 

 suggested. The author suggests that the gum may be a tetra-acetyl 

 derivative of a-cochlosperminic acid which may be a hexosan 

 xylosangondic acid. Like the arabinic acid from gum arabic, gondic 

 acid is rendered less easily soluble in water by prolonged drying 

 at 100° C. Two sugars were obtained from the liquids after removal 

 of the gum-acids, one appears to be a hexose. The other is probably 

 xylose. E. Drabble (Liverpool.) 



Sawyer, J., Tinctura oleae foliorum. (Pharm. Journ. Oct. 6<^^ 1906.) 



An extract of the leaves of Olea Europaea serves as a good 

 tonic. The leaves and young bark contain a crystallizable substance 

 which Pallas designated Vanquelline and also a bitter principle to 

 which he attributed the febrifugal properties of the plant. The young 

 bark contains more of these principles than do either the leaves 

 or the old bark, but the leaves seem to furnish preparations of a 

 more constant Constitution than those from bark. 



E. Drabble (Liverpool.) 



