William Snow Miller 393 
Fig. 3. From a section taken parallel to, and including, the pleura of the 
lung of a dog. Thickness of section 100 micra. The lymph vessels are fully 
distended. L. V.=lymph vessel. P. A.—pulmonary artery, situated beneath 
the pleura. A radicle can be seen arising from the artery and giving origin 
to the network of vessels about the lymphatics. x 50. 
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