202 



Table 7. 21w capture of green chlorophyll corpuscles hy colour- 

 less Spongillae from a diluted suspension (in water) o f such corpuscles 

 isolated from a green sponge. 



Some equal cylindrical glass vessels were filled with 3 L. of water 

 from the conduit; then a same quantity of the material, pressed out 

 from a green Spongilla, was added to each vessel of one series; so 

 all vessels looked equally grayish. This suspension always proved to 

 contain green chlorophyll corpuscles only, no other algae. Next an 

 equally large piece of colourless Spongilla was placed in each vessel 

 of the series, except in one, and all vessels exposed to light or kept 

 in darkness. Sometimes also an equally large piece of colourless Spon- 

 gilla was put into a vessel fdled with water from the conduit only, 

 and exposed to the same conditions. 



In the tables is indicated: a. The degree of troubling of the culture 

 suspension (-1- -f + + = very much troubled; = clear), h. The 

 colour of the sponge, c. The presence (-j-) or absence (0) of oscular- 

 tubes. These data are given for several days. The chief series have 

 been mentioned. As for the discussion, see pag. 28, 49; for the con- 

 tinuation of the experiments, see Table 8, 



Table 7 A. 



in light; volume sponge 10 cM^; 9 — VI — '15. 



