/^8 - 1,00 pptn of chlorine, 1 hour in 12, plus raisin.p; tempera- 

 ture of vrater to 110°F. for 30 mins. per week. 



In this case nevr wooden test blocks 2"jcli"xli" vrere placed in the weir 

 boxes as well as panels 6"x6"xl" which had been submerged in the ocean 

 for some time until they contained active adult teredinidae. Operation 

 of the apparatus began on July 27, 19^1 and continued until December 7, 

 19^1. The results of the examination of the exposed specimens were as 

 follows ! 



#1 - Control - new block - Moderate Limnoria activity in springy/ood 



to a depth of l/S" vath all organisms 

 active. Block well filled with Banki a 

 gouldi . 



6x6 panel - Panel completely destroyed by Bankia and 

 disintergrating. Numerous live Limnoria . 



#2 - 0.2$ ppm chlorine continuously - Nev/ block - No attack. 



6x6 panel - Panel in approximately same physical con- 

 dition as when placed on test. Bankia 

 all dead. Limnoria tunnels emptj'-, 



i^3 - No chlori ne. Temperature raised to IIQOF. 30 mins. per week. 



new block - 13 Li mnor ia tunnels, 1 live Limnoria . 

 No Ban kia present. 



6x6 panel - Panel in approximately same physical 

 condition as #ien placed on test. 

 Bankia all dead. All Limn oria tunnels 

 empty. 



#U - 0. 2$ ppm chlorin e continuously, plus temperature raised to 

 ~ 110°F. 30 minutes per week. 



nevif block - U empty Limnoria tunnels. No Bank ia . 



6x6 panel - Panel in approximately same phjrsical 

 condition as vrhen placed on test, 

 Bankia all dead. All Limnori a tunnels 

 empty . 



#5 - 1.0 ppm chlorine , 1 hour in 6. 



nevj- block - 70i Bankia, several of which were 

 dead. 3 emptj'" Li mnoria tunnels. 



6x6 panel - Destruction of wood proceeder' to some 

 extent beyond the original condition, 



M - h 



