GOLGI BODIES OF TUMOUR CELLS 371 



extremely difficult the interpretation of the histological pictures. 

 It is necessary to add here that a description of Veratti's 

 original method was published by Barinetti in a paper which 

 had been previously overlooked (1). 



No conclusive results were reached by the investigation of 

 the Eat 9 carcinoma either by the cobalt nitrate or by the 

 potassium antimoniate methods in spite of repeated attempts 

 made in different stages of the absorption process. Successful 

 impregnations were obtained only when most of the tumour 

 cells were in a healthy condition, and it is therefore proposed 

 not to include this tumour in the following description. How- 

 ever, the fact was worth mentioning because it has a parallel 

 in a previous observation regarding a transplantable lipo- 

 sarcoma of the guinea-pig. In that case satisfactory results 

 were obtained by Golgi's arsenious acid method, but not 

 by others. The two observations taken together seem to 

 indicate that biological conditions, through which tissues may 

 be passing, have sometimes a decisive influence on the reaction 

 to which the silver impregnation is due. Ernst's (10) recent 

 investigations on certain phenomena of adsorption are in 

 favour of this supposition. 



The Apparatus of Spontaneously Absorbing Carcinomata 

 AND Sarcomata of the Mouse. 



Jensen. — As previously described, the apparatus of the 

 healthy cells of this tumour has a perinuclear or juxta-nuclear 

 position, and generally consists of minor parts ring- or loop- 

 like in shape. This is also seen in the small group of unaltered 

 cells shown on one side of PL 19, fig. 1, which was drawn from 

 a zone of transition between a surviving nodule and an absorp- 

 tion area. In most of the degenerating tumour cells the 

 apparatus is recognized because of its characteristic aspect, the 

 ring- and loop-like shapes being scattered in the cytoplasm 

 instead of being collected in one juxta-nuclear formation. 

 Only in a relatively small number of cells an irregular fragmenta- 

 tion of the apparatus is observed, though this phenomenon 

 becomes more and more apparent and lastly predominates 



