208 The Commercial Products of the Sea. 



Porpoise Oil. A fishery for the porpoise (Delphinus 

 pJwcana) is carried on off the coasts of Trebizond ; it is 



FIG. 15. 



Black porpoise (Phoccena vulgaris). 



taken in nets, and also shot. This fishery yields upwards 

 of 700,000 Ibs. of oil per annum, a portion of which is con- 

 sumed by the lower classes for lighting, and the rest finds a 

 market in Constantinople. Porpoises are also caught in 

 large numbers in the Little Belt, Denmark, where 1500 to 

 2000 are frequently obtained. 



The extraction of the oil of the white whale (Beluga 



FIG. 16. 



Grampus (Phocana orca). 



catodon} and of the black porpoise constitutes an important 

 industry in the district of Quebec, on the St. Lawrence 



