420 



E. T. Bell. 



collagenous fibrillse out in the surrounding tissue. The coarse orange- 

 colored fibers (pr) are the processes of the cells. The cells seem 

 for the most part to be bipolar and often are spindle-shaped. Some 

 are provided with very long processes. It is easily possible that 

 some have more than two processes — I could not determine this very 

 well in the thin sections used. The open spaces of the tissue, which 

 give it the reticular appearance, are clearly brought out. The cell 

 processes were followed in some cases for a consideralde distance 



Text Figure 4. Section through a lobule of renal preadipose tissue from a 

 40 com. foetus when the true fat cells are just beginning to form, al, lobule 

 of adipose tissue; hv, blood vessel; Pa, preadipose tissue. Fixation, Zenker's 

 fluid. Iron-hsem. stain, x ^8. 



among the collagenous fibrillar l)ut their exact method of termina- 

 tion was not determined. 



Fig. 8, Plate I was drawn from a section stained deeply with 

 iron-haematoxylin and not decolorized. This is an excellent stain 

 to use as a control for Mallory's anilin blue. It stains the fine 

 fibrillse black. The processes (pr) of the cells are coarser and darker 

 than the fibrillse (/) so that their recognition is easy. The nuclei 

 of the cells can hardly be distinguished however on account of the 

 intensity of the stain. 



