Angewandte Botanik. 91 



Schluss folgen noch die Methoden der quantitativen Bestimmung 

 und die Bedeutung in technischer Hinsicht. Th. Weevers. 



Drabble, E., Carapa procera DC. An oil yielding tree of West 

 Africa. (Quart. Journ. Inst. Com. Research. Liverpool. III. p. 21— 24. 



illustr. 1908.) 



A resume of the species of Carapa^ and a description of the 

 fruits and seeds of C. procera with notes on the oil they yield. 



W. G. Freeman. 



Drabble, E., The Bark of the Red and White Mangroves, 

 tanning materials from West Africa. (Quart. Journ. Inst. Com. 

 Research. Liverpool. III. p. 33—37. illustr. 1908.) 



The Red Mangrove of West Africa is Rhisophora Mangle 

 L., and the White Mangrove Laguncularia racernosa Gr. A short 

 description is given of each plant, and a detailed account of the 

 anatom}' of its bark. W. G. Freeman. 



Drabble, E., Irvingia gahonensis, Aubry-Lecompte. (Quart. Journ. 

 Inst. Com. Research. Liverpool III. p. 20. illustr. 1908.) 



The seeds of this West African tree of the Simarubaceae 

 yield, when roasted, the so called Dika Fat or Dika Butter. 

 The note is mainly confined to a description of the seeds. 



W. G. Freeman. 



Dunstan, W. R. and T. A. Henry. The Poisonous Properties 

 of the Beans of Phaseolus haiatus. (Journ. Bd. of Agric. XIV. 

 p. 722-731. 1908.) 



The seeds of Phaseolus lunatus are known under man}- common 

 names e. g. Rangoon, Burma, Paigya, Lima, Java and Duffin 

 Beans. They var}" in colour and in 1901 dark coloured beans from 

 Mauritius were found to yield prussic acid due to the action of a 

 contained ferment on a glucoside called phaseolunatin. Consumers 

 were warned against the use of red and dark coloured beans. More 

 recentl}" some white varieties of Rangoon and Burma beans in 

 commerce have been found to 3aeld prussic acid in appreciable 

 quantity also. 



There is at present no evidence that either the red or white 

 beans have caused cattle poisoning although they have been in use 

 as a feeding stuff for several j^ears. 



The percentage of prussic acid found b}^ various workers in 

 Ph. lunatiis beans from different sources is recorded, and analogous 

 cases of prussic acid occurrence in some other plants briefly discussed. 



W. G. Freeman. 



East, E. M., A note concerning inheritance in sweet corn. 

 (Science, n. s. XXIX. p. 465-466. Mai 19, 1909.) 



Contrary to the current Classification of sweet corns as a Single 

 subspecies group {Zea saccharata Sturtevant), it is shown that both 

 "dent corns" and "flint corns" have become "sweet corns" through 

 a large loss of their original starch forming power. The flint tj'pes 

 of sweet corn are said to be more sugary than the others through 

 reaching edible maturity more quickly and hence with less con- 

 version of sugar into starch. Trelease. 



