UTILIZATION OF GR.IPE POMACE AND STEMS. 15 



added the value of the seed ($500), making the total profit in plan 

 No. 3 $1,250. 



If the seed were all assembled at a central cooperative plant and 

 manufactured into oil a greater profit could be realized by the pro- 

 ducers. 



The residue remaining from the manufacture of the jelly was in- 

 vestigated for its jDossible value as a stock food. After drj'ing and 

 reducing to meal it was foimd to have approximately the following 

 composition, indicating excellent stock- feeding qualities : 



I'er cent. 

 Protein 11.06 



Ether extract 7. 87 



Nitrogen-free extract 59. 92 



Crude fiber 21.24 



r 



Fig. 9. — A l-expcller type of press. 



The total quantity of dry residue would be approximately 1,435 

 tons, which, valued at $17 a ton. would ])ring a gross return of $24,395. 



MANUFACTURE OF OIL FROM GRAPE SEEDS. 



Two methods of oil recovery are employed in extracting the oil 

 from grape seeds: (1) The pressure metliod and (•2) the solvent- 

 extraction method. 



The most economical pressure method is by means of the ex[)eller 

 type of press (fig. 9). The ground seed is fed continuously into the 



