404 



E. T. Bell. 



droplet seen in a section of a muscle fiber. The sections were 30 

 microns to 60 microns thick. In a section through the neck a gronp 

 of muscle fibers, in paired muscles on either side of the cartilaginous 

 neural arch, is loaded with fat droplets. The group is symmetrically 

 situated, occupying exactly the same part of each muscle. This 

 may mean that the presence of fat is closely associated with the growth 

 of the fibers, as these two zones of muscle must be in about the same 

 developmental stage. A few cells of the cricoid cartilage contain 

 one or more fine droplets of fat. The cartilage cells of the centra 

 of the vertebrae contain in some sections no fat at all, in other sec- 



Text Figure 1. Preiulipose tissue around two small blood vessels. From 

 the subcutaneous tissue of the brisket of a 24 em. f fetus. hi\ blood vessel; 

 f(\ ordinary fibrillar ( onnective tissue ; ]', preadipose tissue. Fixation, Gilson's 

 fluid. Iron-luvm. stain. X -CO. 



tions nearly every cell contains one or more fat droplets. Fat is 

 also present in the cartilage cells of the femur. ]S"o fat is present 

 in the kidney or in the renal preadipose tissue. 



7 cm. foetus (Zenker fixation). Fine fat droplets are present 

 in the cartilage of the femur. ISTo fat was found in the muscles 

 of the thigh. No other tissues were examined. 



10.1 cm. ftt'tus. A great many hepatic cells contain one or more 

 fat droplets. A considerable niunber of the droplets are annular 

 or crescentric in shape. The cells around the large veins are more 

 densely packed with fat droplets than those elsewhere. No fat is 



