668 Physiologie. 



On a appelle ce corps hemopyrrol. S'il y a veritable 

 analogie entre la filoporphyrine et l'hematoporphyrine, la filo- 

 porphyrine traitee de la meme facon doit se transformer ä 

 priori en hemopyrrol. 



Apres de longues etudes, penibles ä cause de la difficulte 

 d'obtenir la quantite necessaire de substance, Marchlewski 

 iinit par obtenir Phemopyrrol en partant de la filoporphyrine. 

 Cette fameuse ddcouverte cree un lien intime et indestructible 

 entre le monde vegetal et animal. 



Mathilde Goldfluss (Lemberg.) 



Reed, H. S., Methods in Plant Physiology. (Journal of 

 Applied Microscopy. V. 1902. p. 1846—1847, 1890—1891, 

 1927—1928.) 

 A description of methods for performing simple laboratory 



■demonstrations in plant physiology. Mac Dougal. 



RlMBACH, A., Physiological observations on the sub- 

 terranean organs of some Californian Llliaceae. 

 (Botanical Gazette. XXXIII. 1902. p. 401—420. 1 plate.) 



Ten species of geophilous plants were examined which 

 may be divided into three groups according to their habit of 

 burying themselves in the earth. CLlntonia, Prosarfes and 

 Fritillaria are examples of the class in which the location is 

 determined by the action of the rhizome alone, the roots being 

 non-contractile. 



In Lilium, Scoliopus and Trillium the growth of the 

 horizontally developing rhizome is influenced by the action of 

 the contractile roots which are numerous. 



Zygadenus, Chlorogalum, Calochortus and Brodiaea con- 

 stitue a group in which the rhizomes are vertical and their 

 Position is determined by the contractile roots alone. 



A differentiation of function and form into nutritive and 

 contractile roots occurs in Calochortus, Chlorogalum and 

 Brodiaea. 



The roots of some species may live for many years, while 

 in others they endure for but a few months. The contractile 

 and storage function is distributed among these organs 

 irrespective of their length of life. Mac Dougal. 



Sawa, S„ Are Coffein and antipyrin in high degree 



poisonous for plants? (Bulletin of the College of 



Agriculture, Tokyo Imperial University. Vol. IV. No. 5.) 



Coffein and antipyrin in a dilution of 1 p. m. were found 



injurious to onion plants, the noxious property of the former 



being much stronger than that of the latter. A stimu- 



lating effect of these substances in the above mentioned delution 



could not be observed. Miyoshi. 



