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WARREN WISBY 



and of the sea-water system, should pro- 

 duce a marine, controlled-environment 

 laboratory that will be as useful and con- 

 vient for scientists of the future as for 

 those of us who will be fortunate enough 

 to use it today. 



ADDENDUM 



Since this was written, the new installa- 

 tion has been made with duplicate intake 

 and distribution systems. Valves are so 

 arranged that one of the alternate systems 

 is allowed to remain at rest, filled with salt 



water for a period of 1 or 2 weeks, more 

 than sufficient to kill attached organisms, 

 through anoxia. At the end of this period, 

 the stagnant water, with the remains of 

 dead organisms, is flushed out with clean 

 sea water, and the system is returned to 

 service. Lack of sufficient experience pro- 

 hibits any statement on successful per- 

 formance. In the unlikely circumstance 

 that this procedure does not reduce at- 

 tached growth, provision is made for the 

 introduction of either fresh water or 

 chlorinated water into the resting system. 



