102 



YEARBOOK, PUBLIC MUSEUM, MILWAUKEE. 



[Vol. I. 



the use of the swim bladder or sounds for the making of gelatine 

 and agar-agar. 



In like manner an excellent lot of material is on exhibit showing 

 the modern utilization of sharks, rays, porpoises and other marine 



Fig. 51. — Exhibit showing the Codfish and its products. 



