UTILIZATION OF GRAPE 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 possible value as a stock food. After drying and 
reducing to meal it was found to have approximately the following 
composition, indicating excellent stock-feeding qualities: 
Per cent. 
JETRO KG riiih 2 Sie el Sa eae Re Seti, i ane te ans ee ee ee a 11. 06 
TES Ee Ta a Ly ANG Gee eee ew Eee ma SS ie Bee Toreitl 
INIT G rare ht CESS Fa CC ae a aN ST Set es Die 59. 92 
CONE ECGUS) IB OYSTER at Sas a I 2 SG ere 21. 24 
Fig. 9.—A 1-expeller type of press. 
The total quantity of dry residue would be approximately 1,435 
tons, which, valued at $17 a ton, would bring 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 method and (2) the solvent- 
extraction method. 
The most economical pressure method is by means of the expeller 
type of press (fig. 9). The ground seed is fed continuously into the 
