28 
BULLETIN 927, U. S. DEPARTMENT OF AGRICULTURE. 
Since it is shown (Table IX) that the most economical operation 
is involved in drying the material at the respective pulping plants, 
the total handling cost of this utilization project would be the sum of 
the cost of preparing the seed and the manufacture of the oil by 
either the expeller or the solvent-extraction method, which is shown 
in Table X. 
Table X. — Comparison of the cost of tomato-seed utilization by either the ex- 
peller or the solvent-extraction method. 
Operation. 
Expelling. 
Solvent 
extraction. 
Preparation of seed 
Recovery of oil , 
Total handling cost 
S34, 881 
17,525 
$34, 881 
16,625 
POSSIBLE RETURNS AND NET PROFITS FROM OIL, CAKE, AND MEAL. 
In estimating the possible returns from the oil, cake, and meal ob- 
tained from the seed, a price of 16 cents a pound for expeller oil and 
14.5 cents a pound for extracted oil was used as the basis of calcula- 
tion. The value of the oil cake was estimated on the basis of $40 a 
ton, or 2 cents a pound, and the solvent-extracted meal at $30 a ton, 
or 1.5 cents a pound. 
The gross and net returns from oil, oil cake, and meal from 1,000 
tons of tomato seeds manufactured by the two processes described 
and yielding IT and 20 per cent of oil by expression and solvent ex- 
traction, respectively, are shown in Table XL 
Table XI. — Estimated gross and net returns from tomato-seed oil, cake, and 
meal obtained by either the expeller or the solvent-extraction process. 
Quantity 
(pounds). 
Price per 
pound 
(cents). 
Value. 
Products. 
Expeller. 
Solvent ex- 
traction. 
Oil 
340,000 
400, 000 
1,660,000 
1 , 600. 000 
16 
i a 
2" 
n 
$54, 400 
33"200" 
Do... 
$58,000 
Cake 
28,000 
87,600 
52; 406 
86.000 
51, 506 
35.194 34 494 
' 
It is estimated that an oil-extraction plant will handle the entire 
tomato-seed waste in two months, which, added to the three months 
of the operating season during the summer when the seeds are col- 
lected and prepared, represents five months' operation throughout 
the year. The above profits, therefore, which represent an operat- 
ing season of five months, could be increased by extending the opera- 
