Physiologie. - Algae. 66^ 



Sawa, S., Has urea any poisonous action on phanero- 

 gams? (Bulletin of the College of Agriculture, Tokyo 

 Imperial University. Vol. IV. No. 5.) 



Onion plants were cultivated in Knop's Solution to which. 

 0,5 p. m. urea was added. The poisonous effects hereby 

 noticeable are probably due, as the author thinks, to the fact, 

 that the urea splits up into carbonic acid and ammonia, the 

 latter of which kills the chlorophyllbodies. Miyoshi. 



Sawa, S., On the poisonous action o f p o t a s s i u m 

 persulphate on plants. (Bulletin of the College of 

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



A 0,5° o Solution of potassium persulphate killed Spirogyra, 

 Mcsocarpus and Diatoms within one hour and poisoned the 

 branches of rape after three days. With 0,1 °/o Solution no effect 

 was observed in onion plants. Cucurbita plants suffered, however, 

 even from a 0,1 per mille Solution. Miyoshi. 



Uno, H., On the amount of soluble albumin in 

 different parts of plants. (Bulletin of the College 

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



Roots, stems, leaves and flowers of various plants were 

 examined for the quantity of soluble albumin. In the majority 

 of cases the leaves contain the most, in Linum usitatissimum 

 and some Leguminoseae (3 cases out of 6 examined) the roots 

 contain, however, more albumin than the leaves do. Miyoshi. 



COLUNS, F. S., An algologist's vacati.on in Maine. 

 (Rhodora. VI. p. 174—179. September 1902. 



A general account of the algological character of the 

 regions in the vicinity of Cutler, Machias, Jonesport and South 

 Harpswell, Maine. Plectonema Battersii and Porphyra 

 amplissima both new to New England are recorded, and 

 Antithamnion boreale found in quantity. Moore. 



Eichler, B., Sur une algue du genre Cladophora c a u s a n t 

 la mort du Lymnaeus stagnalis. (Wszechswiat. T. XX. 

 1901. p. 656.) 



L'auteur decrit un cas interessant de Symbiose d'une algue 

 du genre Cladophora avec un petit mollusque, le Lymnaeus 

 stagnalis. La plante ainsi que le mollusque habitent les etangs 

 et les eaux stagnantes. L'algue possede de nombreux filaments 

 peu ramiiies et divises dichotomiquement ä la base; ces 

 filaments s'allongent beaucoup au sommet et y poussent de 

 courtes ramifications ä cellules raccourcies, cylindriques, ayant 

 26 — 65 t a de largeur et une longueur 2 ä 3 fois plus grande. 

 Cette algue rappeile par ses ramifications et la forme de ses 



