24 ELEMENTS OF MAMMALIAN ANATOMY. 



so that its lumen can be filled with about 200 c.c. of 

 15% formalin. The same amount should be injected 

 into the lungs by inserting the cannula caudad into 

 the ventral wall of the trachea. If the cat is not to 

 be used at once, it may be preserved several months 

 by wrapping it in a piece of muslin saturated with a 

 solution of thymol (thymol, 5 gin., dissolved in 200 

 c.c. of hot water). Thymol is a fungicide. An outer 

 wrapping of well-vaselined cloth prevents evaporation 

 in case the specimen is kept in a dry room. 



The portal system is not injected through the jugular 



vein. The portal trunk just caudad of 

 where it enters the liver may be found 

 by cutting a piece from the abdominal 

 wall on the right ventral aspect just 

 caudad of the last rib. After two loose 

 knots are tied around this trunk as 

 directed for the jugular, the cut is made 

 and the cannula inserted caudad. About 



FIG 6 -PALM\R T 5 c - c - f ^ ie ^ ue mass ma Y be injected 



ASPECT OF CAT'S into the portal system of a large speci- 



PAW WITH CAN- ^ t . . j ,-i 



NULA INSERTED. men. This should not be injected until 



the other systems have been filled. 

 The lymphatic system must likewise be injected for 

 demonstration. While the cat is being anesthetized, 5 

 gm. of soluble Berlin blue are dissolved in 100 gm. of 

 water, and the solution warmed to about the tempera- 

 ture of the body. As soon as the cat is unconscious 

 the syringe should be warmed by filling it with hot 

 water, and the point of the cannula pushed obliquely 

 proximad under the thick skin on the palm (Fig. 6) 

 of the paw. The syringe after being half filled with 

 Berlin blue solution is attached to the cannula and the 

 plunger pushed in very slowly so that one-fourth of the 



