ILLUSTRATIONS 



Page 



Figure 1. — Inshore Sheepswool 8 



Figure 2. — Rock Island Sheepswool 9 



Figure 3 . — Mediterranean Bengasi 10 



Figure It . — Florida Key Wool 10 



Figure 5 . — Cuban Sea Wool 10 



Figure 6 . — Florida Yellow 11 



Figure 7 . — Anclote Grass 12 



Figure 8 . — Hudson Grass 13 



Figure 9. — Relationship in the Fall of 1955 between the price 



of natural sponges and their size 15 



Figure 10 . — Wet test equipment 37 



Figure 11. — Abrasion test equipment hi 



Figure 12 . — Natural sponges abrasion loss 50 



TABLES 



Table 1. — List of faults and maximum number of demerits given 



for each one 18 



Table 2. — Sheepswool sponges graded by demerits — No. 1 Forms .. 19 

 Table 3. — Average number of demerits characteristic of each 



grade of Rock Island Sheepswool sponge 28 



Table i;. — Average number of demerits characteristic of each 



grade of Inshore Sheepswool sponge 29 



Table 5. — Average number of demerits characteristic of each 



grade of Florida Yellow sponge 30 



Table 6. — Average number of demerits characteristic of each 



grade of Anclote Grass sponge 31 



Table 7. — Average number of demerits characteristic of each 



grade of Florida Key Wool sponge 31 



Table 8. — Average number of demerits characteristic of each 



grade of Hudson Gra ss sponge 32 



Table 9. — Average number of demerits characteristic of each 



grade of Mediterranean Bengasi sponge 33 



Table 10. — Average number of demerits characteristic of each 



grade of Mediterranean Deepwater sponge Jh 



Table 11. — Average number of demerits characteristic of each 



grade of Cuban Sea Wool sponge 3U 



Table 12. — Relationship between the diameter of Rock Island 



Sheepswool sponges and their approximate weight .... 36 



Table 13 . — Water-holding power It.2 



Table lli. — Squeezed wetness U3 



Table 15 . — Cleanability ii3 



Table 16. —Stiffness Ui 



Table 17. —Elasticity 1*5 



Table 18. — Shape recovery I46 



Table 19. — Results of washing Rock Island Sheepswool sponges .. 52 



