The R61e of the Phagocyte in Cerebrospinal Meningitis. 439 



DESCRIPTION OF PLATES. 



Experiment 3. 



Fig. 1. — Photograph of planted out leucocytic deposit (1) of spinal fluid washed four 

 times in 1 per cent, sterile glucose, after 24 hours' incubation at 37° C. 



Fig. 2.— Photograph of planted out leucocytic deposit (2) of spinal fluid washed 16 times 

 in 0'85 per cent. NaCl, after 24 hours' incubation, at 37° C. 



Fig. 3. — Photograph of plate after 24 hours' incubation, to show the action of glucose on 

 the growth of the meningococcus. Upper half of the plate shows eight dilutions of 

 the germ in 1 per cent, glucose, while the lower half shows the same number of 

 dilutions in distilled water. 



The top and bottom line show the highest dilutions in each case. 



Experiment 4. 



Fig. 4. — Photograph of plate with leucocytic deposit of washed spinal fluid planted out 

 immediately. In upper portion of plate the deposit has been planted out untouched. 

 In the lower, the deposit has been crushed with sterile glass powder. Growth about 

 the same on both portions of the plate, possibly slightly greater on the crushed area. 



Fig. 5. — Photograph of leucocytic deposits similar to the last, but in this case they have 

 been treated with 0'85 per cent. NaCl for three hours before being put on the plate. 

 The upper portion of the plate represents the uncrushed while the lower shows the 

 crushed deposit. Four or five colonies are showing after 24 hours' incubation in the 

 upper half, while only one has developed in the lower half of the plate. 



Experiment 5. 



Fig. 6. — Photograph of plate used in Experiment 5, showing growth obtained at the end 



of 24 hours' incubation at 37° C. 

 Fig. 7. — Photograph of the same plate at 48 hours' incubation. 



Fig. 8. — Microphotograph x 1000 showing in centre a large polymorph cell from freshly 

 drawn spinal fluid being burst open by growing meningococci. 



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