FIG. 1. Alveoli of the udder in cross-section, showing: (,4) fat-droplets in thp epithelial 

 cells, (B) division of the nucleus, (C) a leucocyte in an epithelial cell, CD) epithelial cell with 

 protoplasmic projection, alveolar content with (E) cells and (F) free fat, and (G) interalve- 

 olar connective tissue. (From Chemie und Physiologic der Milch, by Dr. W. Grimmer.) 



FIG. 2. Cross-section of an alveolus of the udder at the time of parturition. M) 

 epithelium, (B) basket cells, (C) leucocytes, (Z>) nuclei of connective-tissue cells, () blood 

 capillary. (From Chemie und Physiologic der Milch, by Dr. W. Grimmer.) 



