Table 12. — Relationship between the diameter of Rock Island 

 Sheepswool sponges and their approximate weigfr5~ 



Diameter of sponge 



Weight of sponge 



Inches 



ioi-ii 

 10 - ioi 



91-10 

 9 - 9i 

 8|- 9 

 8 - 8| 

 7|- 8 

 7 - 7| 



6|- 7 



8-10 



6 - 6k 



10 - 12 



$>- 6 



12 - 16 



5 - & 



16 - 20 



1£- 5* 



20 - 25 



U - iti- 



25 - 30 



3i - u* 



30-35 



* Except for shrinkage effects, forms would not appear 



36 



