STUDIES ON THE LUMINOUS FUNGUS. 



15 



TABLE OF THE RESULTS OF EXPERIMENTS WITH BEGARD TO THE 

 EFFECT OF TEMPERATURE ON THE LUMINOSITY IN WATER. 



Tempera- 

 ture of 

 water. 



Duration from 

 start of ex- 

 periment to 

 first indica- 

 tion of decline 

 in luminosity. 



Duration from 

 start of ex- 

 periment to 

 extinction of 

 luminosity. 



Duration in 

 which the 

 object was al- 

 lowed to re- 

 main in the 

 same tempera- 

 ture after ex- 

 tinction of 

 luminosity. 



Duration from 



restoration of 



object into 



open air to 



first indication 



of luminosity 



revival. 



Duration from 



restoration of 



object into 



open air to 



full revival of 

 luminosity. 



Remarks. 



; 0°C. 



5 sec. 



30 min. 







1 min. 



5 min. 





10.7°C. 



10 min. 



X 







30 sec. 



1 min. 





30°C. 



20 sec. 



5 min. 



X 



1 sec. 



5 sec. 





| 35°C. 



10 sec. 



3 min. 











10 sec. 





40°C. 



5 sec. 



1 min. 



12 min. 



30 min. 





Partial re- 

 covery of 

 luminosity. 



47°C. 



2 sec. 



10 sec. 











Luminosity 

 not recovered. 



60°C. 







5 sec. 











>» » 



To summarize the results of my experiment : The fungus-light 

 in the air, when cooled to -10°C, became invisible after twenty 

 minutes ; on removal of the object to room-temperature after an 

 hour and twenty minutes, the luminosity gradually recovered 

 itself, but when allowed to remain in the same low temperature 

 for five hours and twenty minutes, the recovery did not take place. 

 In a temperature of — 10°C, a considerable time was required 

 for the setting in of the invisible state ; and if the object was 

 taken out within an hour, it always well recovered the luminosity, 

 but if kept for a longer period in that temperature, the recovery 

 did not take place. As may be gathered from the above experi- 

 ments, both the rise of temperature to 30 — 60°C. and the fall to 

 5 10°C. excercise decrescent effect upon the luminosity. In no 



