86 CIRCULATION OF BLOOD AND LYMPH. 



ments (Weiss) indicate that it has a velocity in the duct in the neck of about 

 4 mms. per second, but this velocity changes naturally with the conditions 

 influencing the production of lymph in the tissues. Heidenhain estimates that 

 for a dog weighing 10 kgms. the total outflow from the thoracic duct in 24 

 hours is equal to 640 c.c. Munk and Rosenstein, from observations upon a 

 case with a lymph fistula, estimated that in man the flow may be equal to 

 50 to 100 or 120 c.c. per hour. 



