PULMONAEY VESSELS. 



Fi-. 185. 



277 



Fig. 185. — An Alteoltjs from the Lung of a new-born Child, stained with 



Nitrate op Silver to show the Epithelium (F. E. Scliultze). 500 Diameters. 



Some of the cells are mucli more distinct and granular than the rest. 



to be found free in the air-cells and smaller bronchial tubes : not 

 unfrequently they contain carbonaceous particles. It is conceivable 

 that by the migration of these cells into the pulmonary tissue, the 

 carbon particles may be conveyed into the substance of the lung and 

 thence into the lymphatics and bronchial glands. 



Fi£r. 186. 



Fig. 1S7. 



Fig. 186.— Capillary Network of the IIlman Lung (Kolliker). 60 Diameters. 



Fig. 187.— Capillary Network of the Pulmonary Vesicles of the Horse (from 

 Frey after a preparation by Gerlach). 100 Diameters. 

 a, the capillary network ; h, the terminal branches of the pulmonai-y artery passing 

 towards and surrounding in pai't each pulmonary vesicle. 



