XL] 



BACILLUS : PATHOGENIC FORMS. 



139 



spindle-shaped, contained between the connective-tissue 

 bundles. 



In a section through the liver of a bird (Rhea) 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. 

 i. 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 



