United States Department of the Interior, Fred A, Seaton, Secretary 

 Fish and Wildlife Service, Arnia J« Suomela, Commissioner 



BACKGROUND INFORMATION FOR VOLUNTARY GRADE STANDARDS 

 ON NATURAL SPONGES 



By Robert B. Bennett 



For the Bureau of Commercial Fisheries 

 United States Fish and Wildlife Service 



Contract No. 1U-19-C08-2378 

 University of Florida Project No. 5527 



Department of Chemical Engineering 

 Engineering and Industrial Experiment Station 

 University of Florida 

 Gainesville, Florida 



Special Scientific Report—Fisheries No. 273 



Washington 25, D. C« 

 May 1958 



