American journal of physiology . 3 4 Figure 10. —Worm H, Set 13-Record: 1. II- 2. II- 3. II- 4. II- Figure U. — Worm M, Set : 1. - 2. II- 3. II 4. 11+ 5. On the Movements of the Earthworm. 477 travelled as far as the length of its own body, was traced directly onthe plate forming the roof of the apparatus with a brush dipped inIndia ink. It was then drawn on tracing linen. Figures 8, 9, 10, and11 are typical examples of the results obtained by this method. Theend of the indifferent path is indicated by the straight lines; for thesake of clearness the path is widened in the diagram


American journal of physiology . 3 4 Figure 10. —Worm H, Set 13-Record: 1. II- 2. II- 3. II- 4. II- Figure U. — Worm M, Set : 1. - 2. II- 3. II 4. 11+ 5. On the Movements of the Earthworm. 477 travelled as far as the length of its own body, was traced directly onthe plate forming the roof of the apparatus with a brush dipped inIndia ink. It was then drawn on tracing linen. Figures 8, 9, 10, and11 are typical examples of the results obtained by this method. Theend of the indifferent path is indicated by the straight lines; for thesake of clearness the path is widened in the diagram. Only the longaxis of the worm is shown, so that it is possible to include in one dia-gram the five advances belonging to a set. The twenty experimentsshown were made in the sameday within one hour, and underthe same conditions. They wereselected, because they show theextreme differences. In Fig. 8all five paths lie close together,mainly in the indifferent Fig. 9 they are more scattered,one indifferent, one directly neg-ative, and three diagonally nega-tive. In Fig. 10 they are clos


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