410 E. T. Bell. 



smooth muscle of intestine, blood vessels, glia cells of central nervous 

 system, ependyma cells, and ganglion cells. He also finds a great 

 amount of fat in the heart muscle of a mouse embryo. 



Pfeiffer (26), also using Flemming's fixation as a stain for fat, 

 finds fat in the new-born child in the kidney, liver, some cells of 

 spleen, heart muscle fibers, leucocytes, epithelium and glands of 

 small intestine, and brain. He does not find fat in the tissues 

 mentioned in every case. 



Sata (30) fixed human tissues in Flemming's solution, cut with 

 a freezing microtome, and stained again in one per cent osmic or 

 in Flemming's solution. He finds the lachrymal and submaxillary 

 glands full of fat. He finds fat also in the parotid gland and in the 

 pancreas. 



Erdheim (7) studied the thyroid gland with Sudan. He always 

 finds fat in the human thyroid in the part of the cells next the lumen. 

 He finds fat absent from the thyroid of the foetus and about half 

 the newborn. The droplets increase in size with age. They occur 

 in adenoma and in carcinoma. Fat is present also in the parathyroid 

 and the hypophysis. The amount of fat is not dependent on the 

 nutritive condition of the individual. 



Walbaum (37) finds fat inside the muscle fibers in normal children 

 in about two-thirds of the cases examined, and in about the same 

 per cent of rachitic children. He believes that the presence of fat 

 in this situation is not directly connected with the nutritive condi- 

 tion of the individual. 



Hansemann (15) finds fat often in the epithelium of the human 

 kidney.'^ He regards it usually as a pathological condition, but thinks 

 that it may possibly occur under normal conditions. He finds the 

 renal cells full of fat in a wonum weighing over 300 lbs. He states 

 that in swine the renal epithelium contains almost no fat when the 

 animal is poor, but a large amount when the animal is fat. Cats 

 and dogs have fat in the renal epithelium. 



Traina (36) has contributed a very valuable piece of work on 

 intraepithelial fat. His observations were made on marasmic cad- 



°Tbis paper contains a good survey of the literature on this point. 



