18 



ABT. 3. SEIICHI KAWAMURA : 



dieu m Beijer. shows its luminosity strongest in a temperature of 

 30 — 32 C C, and Photobacterium luminosum Beijer. in that of 25 — 28°C. 

 Lehmann 15 reported that Bacterium phosphorescens Fischer kept at a 

 temperature of 0.1 C C. continued to emit feeble light for several 

 days. Fobstek 25 observed a certain bacterium emit light in tem- 

 peratures of — 20 C C. but lose the luminosity at 32°C. Molisch 35 

 reported for Bacterium phosphor eum (Chon) Molisch that its light 

 was strongest at a temperature of 16 — 18°C, and that the mini- 

 mum and maximum temperatures for its luminosity were respec- 

 tively some degrees below C C. and above 28°C. An experiment 

 by the same author on a luminous mycelium, called by him X 

 mycelium for the sake of reference, showed that it could continue 

 to be luminous in temperatures ranging from -1° to 34°C, being 

 strongest at 15 — 25 C C. 



To tabulate the results obtained by different observers : 



Name of fungas. 



Observer. 



Minimum 

 temperature 



of 

 luminosity. 



Optimum 



temperature 



of 

 luminosity. 



Maximum 

 temperature 



of 

 luminosity. 



Pleurotas japonicus Kawam. 



Kawjxmura. 



3— 5°C 



10— 15°C 



40°C. 



Pleuroius olearius D.C. 



Arcangeli. 



3°C 



8— 10°C. 



40"C. 



PseudomorMS javanicus (Eijk.) Mig. 



Eijkmann. 



-20°C 



25— 33°C. 



45°C. 



Photobacterium iridicum Beijer. 



Beijerink. 





30— 32 , C 





Phatobacterium luminosum Beijer. 



Beijerink. 





25— 28°C. 





Bacterium pfiosphoreum (Cohn) Molisch. 



Molisch. 





16— 18°C 





X mycelium. 



Molisch. 



-1°C 



15— 2VC. 



34°C. 



1) Lehmann, K. B., Sturlien htier Bacterium phosphorescens, (Zentralbl. f. Bakteriol. etc. 

 Bd. V, 'So. 24, 1889.)— 2) Forster, J., Über einige Eigenschaften leuchtender Bakterien, (Zentralbl. 

 f. Bakteriol. etc. Bd. If, 1887, p. 337.)— 3) Molisch, IL, Über das Leuchten des Fleisches 

 insbesondere todter Schlachttiere, (Botan. Zeitg. 1903.)— 6) Molisch, H., Leuchtende Pflanzen, i>. 

 93, 1904. 



