Induced cell-reproduction and . see if this excitationwas due to any chemotactic influence of the jellies were made, one of which contained atropineand the other none; and they were so mixed on aslide that there was atropine in one part of the filmand not in another. Some citrated blood was placedover the line of demarcation to see if the cells neces-sarily extruded their pseudopodia in the direction ofthe concentrated alkaloid. They did not do so, how-ever, for, provided a cell absorbed the alkaloid suffi-ciently, the extrusions were made in all directions asusual. In o
Induced cell-reproduction and . see if this excitationwas due to any chemotactic influence of the jellies were made, one of which contained atropineand the other none; and they were so mixed on aslide that there was atropine in one part of the filmand not in another. Some citrated blood was placedover the line of demarcation to see if the cells neces-sarily extruded their pseudopodia in the direction ofthe concentrated alkaloid. They did not do so, how-ever, for, provided a cell absorbed the alkaloid suffi-ciently, the extrusions were made in all directions asusual. In order to try to find out whether this excitationincreased the ingestion of bacteria by leucocytes, asample of fresh blood was mixed with a volume ofcitrate solution and atropine, which contained bacteriain suspension. Having been incubated for someminutes, the cells were spread on jelly; but when 1 This method will be found in the Appendix, where also another methodof preparing kinetic jelly will be found. EXCITATION AND PHAGOCYTOSIS 151. Fig. 34.—Excitation of two leucocytes by the action of choline. Low power. No stain.
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