Summary Quantitative data have been presented for the effect of “effective extraction size” on the rate of extraction of oil from soybeans, peanuts, cottonseed, corn germ grits, and flaxseed. Both flakes and grits have been studied. The results are best correlated by a straight‐line plot on log‐log paper of “time to 1% residual” and effective extraction size. The slope of the line is a measure of the change in extraction rate with extraction size. The slope was found to be different for the different oil seeds and to be larger for seeds prepared as grits than for the same seed prepared as flakes.

SummaryThe extraction process within the oil‐bearing substance is described in terms of undissolved oil and static holdup. Undissolved oil is bound in the original material through a slowly soluble resistance that is not re‐established by replacing the extracted oil. The rate of solution of the oil is relatively indepenent of the concentration of the extracting solution and is mainly a matter of soaking time. Soaking in anay concentration of miscella below 20% for half the total extraction time required to reduce the undissolved oil to 1% is just as effective as extraction for the entire time with fresh solvent.

THEpractical advantages in the use of fuels having low 10, 35, and 65 per cent points on the A. S. T. M. distillation curve have been indicated in Part IV. The fuel systems of many motor cars, however, are so constructed that in warm weather the temperature of the liquid gasoline frequently reaches 135°to 140°F. and may in some cases exceed 200°F. This fact places a minimum on the temperature of the 10 per cent point in order to insure that the fuel does not vaporize before reaching the manifold.