2o8 The Com7nercial Products of the Sea. 



Porpoise Oil. — A fishery for the porpoise {Delphinus 

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



Fig. 15. 



Black porpoise [Fhoccsna vulgaris). 



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

 of 700,000 lbs. 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 1 500 to 

 2000 are frequently obtained. 



The extraction of the oil of the white whale {Beluga 



Fig. 16. 



Grampus {Phorcena orca). 



catodoii) and of the black porpoise constitutes an important 

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



