Morphology 



365 



to appear elsewhere than in the central nervous system, when the 

 saliva, the salivary glands and the pancreas were known to harbor 

 it. This has now been overcome by the demonstration of the bodies 

 in the salivary glands in precisely the same form as that seen in the 

 nervous system by Manuelian.* 



Steinhardt, Poor and Lambertf have endeavored to determine 



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whether Negri bodies are parasitic micro-organisms or degeneration 

 products of the nervous system, and have shown that when cells 

 of the normal guinea-pig brain are incubated in blood plasma, their 

 cytoplasm, when stained by Van Gieson's stain, show small pink- 

 staining bodies surrounded by a blue granular ring, indistinguishable 



*"Ann. del'Inst. Pasteur," 1914, xxvii, 233. 

 t Jour, of Infectious Diseases, 191 2, xi, 459. 



