202 



Table 7. The ca-plut'c of f/rccii rhlovophyll corpuscles hy colour- 

 lesn Sj>ongillae front n diluted simpension (in water) of ^uch corpuscles 

 i^olated ft'oin a green sponge. 



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

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

 froin 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 füled with water froni the conduit only, 

 and exposed to the same conditions. 



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

 suspension (-|-4~ + -|- = "^'^U niuch troubled; ü = clear). b. The 

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

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

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

 tinuation of the experiments, see Table 8. 



Table 7 A. 



in liglit; volume sponge 10 cIVP; 9 — VI — '15. 



