Journal of Agricultural Research . age larger, being both longer and thicker(fig. i; PI. I, A). The shorter rods supplied with flagella possess most often one ortwo of them (fig. 2). Occasionally three or four are present, but rarely more. Thesespring from almost any part of the organism, but usually from near a pole. Spores arenot produced. Motility.—The movements of the bacillus are both progressive and whirling. Staining properties.—The rods stain readily with the usual anilin dyes and areGram-negative. Agar plate.—The colonies on plain agar form rapidly and have a well defined,entire borde
Journal of Agricultural Research . age larger, being both longer and thicker(fig. i; PI. I, A). The shorter rods supplied with flagella possess most often one ortwo of them (fig. 2). Occasionally three or four are present, but rarely more. Thesespring from almost any part of the organism, but usually from near a pole. Spores arenot produced. Motility.—The movements of the bacillus are both progressive and whirling. Staining properties.—The rods stain readily with the usual anilin dyes and areGram-negative. Agar plate.—The colonies on plain agar form rapidly and have a well defined,entire border and an oval, glistening surface. They are bluish by transmitted andgrayish by reflected light. The colony structure is finely granular and more or lessuniform. The growth is nonviscid and adheres to the medium. Gelatin plate.—Within 24 hours a small area of liquefaction is present about thecolony. Agar slant.—Within a day a moderate, bluish-gray gro^^lh occurs which is con-fined approximately to the surface Fig. I.—Bacillus noctuarum. Fig. 2.—The flagella of Bacillus noctuarum. Gelatin stab.—In 24 hours at room temperature, a white growth is seen along theline of puncture, with beginning liquefaction along the entire needle tract. This ismore marked near the surface of the medium. In three days the liquefied portionis infundibuliform and at the surface has reached the wall of the tube. Potato.—Within 24 hours a moderate, gray, moist growth occurs, which increasesand becomes slightly yellowish. The potato becomes a grayish brown. Gas is formed. Bouillon.—Within four hours the medium becomes slightly cloudy and within aday turbid. It remains cloudy even in old cultures. A slight ring of gro\\th adheresto the wall of the tube at the surface of the medium, a very delicate pellicle ma} bepresent, and a heavy friable sediment forms. Milk.—Within a day a soft coagulum is present which is slowly digested, one-fourth being dissolved within a week and
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