WHITE BEER, LAMBIC, GINGER-BEER. 257 



FIG. 53. Bacterium vermiforme. 



Or-h. The gradual evolution of the cells and chains into the worm form. 



i-m. Development of a sheath increasing on the one side ; the cell-membrane thickens 

 in certain directions only, and not equally all round. Magn. 680. 



x-z. Dissolution of such unilaterally thickened cell-membranes into branched forms, 

 the cells being visible at the extremities of the branches. Culture in ginger-beer nutrient 

 gelatin ; x, observed at 10 A.M. ; y, the same at 4 P.M., and z, at 10 A.M. the following 

 day. The parts indicated by x/xx, xxx, correspond. Magn. 420. (After Ward.)i 



VOL. I. 



