1907] 



OSTERHOUT— BALANCED SOLUTIONS 



265 



! 



* 



i 



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

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

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



i 



\ 



\ 



o 



4 



o 



5 



6 



Fig. 3. — Growth of gem- 

 mae of Lunularia in various 

 3m/8o solutions during 150 

 days. The quantities are 

 stated in cubic centimeters, 

 and the gain in length of 

 thallus in per cent, i, CaClj, 

 gain 810. 2, NaCl 1000 

 + MgCU 78 -f CaCla 10, 

 gain 1000. 3, dilute arti- 

 ficial sea water, NaCl = ap, 



2,m/^<=>i gain 

 NaCl 1060 + 



1204. 

 KCl 



4. 



22, 



gain o. S, NaCl 1000 

 + MgCl, 78, gain 4. 6, 

 NaCl 1000 + MgCla 78 

 + KCi 22, gain 8. 



