190 



b. Spongillae; in light; vol. 3 cM'. 



c. Spongillae; vol. 1| cM^. 



Table 2. The 'production of 0^ hy the isolated green chlorophyll 

 corpuscles of the Spongillidae in light-, proved by means of the 

 Engelmann bacteria-method. Ravel preparations of living sponge tissue, 

 to which some material from a bacterial-Culture was added and also 

 some small airbubbles, under coverglass surrounded with vaseline 

 (pag. 12, J?). Column A indicates after how long a time in light or 

 in darkness the preparations were observed; column B indicates the 

 distribution and the intensity of motion of the bacteria then stated in 

 the preparation. The chief experimental series has been mentioned; 

 in all others the result was tlie same. As for the discussion, see 

 pag. 19—20. 



