B. Squeezed wetness, the next test to be considered in the order 

 of testing, shows (table 1U) that with 1/2-pound per square inch pres- 

 sure, the Florida Yellow sponge releases the least water. No distinc- 

 tion can be made statistically among the other types of sponges tested. 



Table lU. — Squeezed wetness 



Type of sponge 



Number of 

 sponges tested 



Average 



Standard 

 deviation 



Fiducial 

 limits 





2k 



Percent 



Percent 

 8.7 



Percent 



Florida Yellow 



lilul* 



U0.8-U8.1 



Anclote Grass 



2U 



31.6 



13.8 



25.8-37.5 



Rock Island Sheepswool 



28 



29.8 



7.3 



28.0-33.7 



Hudson Grass 



25 



30.8 



5.2 



28.7-33.0 



Mediterranean Bengasi 



25 



35.7 



6.5 



25.0-37.5 



Inshore Sheepswool 



26 



28.6 



5.1 



26.6-30.7 



Mediterranean Deepwater 



28 



27.6 



5.5 



25.5-29.8 



C. Cleanability is the practical result of the two preceding tests t 

 Inshore and the Deepwater Mediterranean sponges, owing to their combined 

 absorbency and softness, can be washed out faster with the same amount 

 of squeezing than can any of the other sponges. The statistical anal- 

 ysis (table 15) shows that Rock Island and Mediterranean Bengasi sponges 



Table 15 .— Cle anability 



Type of sponge 



Number of 

 sponges tested 



Average 



Standard 

 deviation 



Fiducial 

 limits 





28 



Percent 



Percent 

 21.0 



Percent 



Mediterranean Deepwater 



68.5 



60.U-76.7 



Inshore Sheepswool 



26 



62.6 



23.1 



53.2-71.9 



Rock Island Sheepswool 



28 



U8.1 



21.8 



39.6-56.5 



Mediterranean Bengasi 



25 



U6.8 



5.8 



UU.U-U9. 



Hudson Grass 



25 



23.1 



m.9 



17.0-29.3 



Florida Yellow 



2u 



20.6 



8.9 



16.5-2U.8 



Anclote Grass 



2U 



15.8 



10.7 



- 



11.3-20.3 



U3 



