1907] 



OSTERHOUT BALANCED SOLUTIONS 



265 



of germination is very high and the growth is vigorous from the start. 

 The plan first tried was that of carefully placing the seeds on the 

 surface of the solutions so that they float. This worked well with 



O Q 



FIG. 3. Growth of gem- 

 mae of Lunularia in various 

 3w/8o solutions during 150 

 days. The quantities are 

 stated in cubic centimeters, 

 and the gain in length of 

 thallus in per cent. I, CaCl 2 , 

 gain 810. 2, NaCl 1000 

 + MgCl 2 78 + CaCl a 10, 

 gain 1000. 3, dilute arti- 

 ficial sea water, NaCl = ap. 

 3w/8o, gain 1204. 4, 

 NaCl 1000 + KC1 22, 

 gain o. 5, NaCl 1000 

 + MgCl 2 78, gain 4. 6, 

 NaCl 1000 + MgCl 2 78 

 + KC1 22, gain 8. 



