Botanische GSrten und Institut«. — Instrumente etc. 371^ 



The nerve showed itself, linder the conditions of the experi- 

 ment, less sensitive to the action ot" CO2 than was EUnlca, and 

 the latter was less sensitive than a active jMyxoniycetc plasinodiiim 

 (of Badhamia) sirailarly treated. 



Ether vapour in air passed ovcr the plant for two minutes 

 caused a speedy arrest of all movement, and the quiescent con- 

 dition persisted for some minutes longer. Recovery then ensned 

 and the normal rate of movement was slowly regained. With 

 dilute ether vapour (below 10 per cent. in air) insufticient to 

 an.-vsthetise the nerve, the protoplasmic circulation was unatTected. 



Chloroform. — The action of Chloroform proved to bc far 

 more deadly than that of ether. Movement was arrested in less 

 than a minute, and two minutes' exposure to the füll action of it.s 

 vapour caused the death of the cell. 



When a more diluted vapour (ahout 2 per cent in air) was 

 passed over the cell for two minutes recovery ultimately occurred. 



The action of ether and Chloroform, especially the latter, was 

 very marked in causing many of the Chlorophyll granules, whicli 

 had previously becn almost restricted to the lateral walls, and 

 hence liad presented their edges to the incident light, to become 

 dispersed over the surface of the cell, where they were fully 

 exposed, over their largest area to the light. The action of carbon 

 dioxide as observed in these experiments was not nearly so pro- 

 nounced. This phenome non is such as might have beeu antici- 

 pated as a result of the paralysis, temporary or permanent, of the 

 protoplasm. 



Botanische Crärteii und Institute. 



Barbey, William, Une munificence botanique. (Bulletin de l'Herbier Boissier. 



Ann^e VI. 1898. No. 5. p. 345—347.) 

 Jordan, W. H., Director's Keport for 1897. (New York Agricultnral Experiment 



Station. Bulletin No. 142. 1897. p. 721 — 740.) 

 Mühlberg, F., Erster Bericht über den Schulfjarten der Kantonsschule in 



Aarau. (Sep.-Abdr. aus dem Programm der Aargauer Kantonsschule. 1897/98/1 



4». 20 pp. Mit 1 Plan. Aarau (H. R. Sauerländer) 1898. 



lüstrnraeiite, Präparations- und Conservations- 

 Methoden. 



Bancher, F. et Oommergae, ff., Traite pratique dnnalyse chimique et 

 roicrobienne des eaux d'alimentation. 18". 108 pp. Paris (imp. Lev^) 1898. 



Behrens, W., Tabellen zum Gebrauch bei mikroskopischen Arbeiten. 

 3. Aufl. gr. 8'. VII, 237 pp. Braunschweig (Harald Bruhn) 1898. 



geb. in Leinwand M. G. — 



Fasson, M., Agrikultunhemisch-analytisches Taschenbuch. 8°. 30 pp. Berlin 

 (Paul Parey) 1898. M. 1.— 



