XL] 



BACILLUS : PATHOGENIC FORMS. 



139 



spindle-shaped, contained between the connective-tissue 

 bundles. 



In a section through the liver of a bird (Rhed) that died 

 in the Zoological Gardens in London, prepared by Dr. 

 Gibbes after his method of staining for tubercle-bacilli, there 

 were seen innumerable aggregations of larger and smaller 

 pink masses (visible to the unaided eye as dots of the size 

 of a pin's point to that of a pin's head or millet-seed, and 



FIG. 74. FROM A SECTION THROUGH A NODULE OF THE LIVER OF RHEA. 

 r. Cells of various sizes filled with minute bacilli ; owing to the smallness of the 

 bacilli and to their being crowded in the cells and owing to the comparatively 

 low magnifying power (300) the bacilli appear like dots. 



(Stained with fuchsin and methyl-blue.) 



larger). Under the microscope these pink masses were seen 

 to be composed of cells of various sizes, each filled with an 

 enormous number of what appeared under a high power 

 very short bacilli, much shorter than tubercle-bacilli. But 

 they gave the same reaction as tubercle-bacilli. Here and 

 there isolated cells of various sizes could be seen filled with 

 the bacilli. In the large cells the cell-outline was becoming 



