124,364. Dupire, L. J. P. M. J. March 22, 1918, [Convention date]. Addition to 123,711. Yeast recovered from molasses by centrifugal action as described in the parent Specification is washed in a food medium, such as diluted molasses of density 0.5 Bú. and temperature 31? C. and containing phosphate of soda. After a few minutes fermentation, the yeast is separated by a further centrifugal action.