102 EXPERIMENTAL, PHARMACOLOGY 



intermittently with both hands. Watch the movements of 

 the manometer as you compress the heart. Does this af- 

 fect the blood-pressure? Quickly inject from the burette 

 two cubic centimeters of adrenaline solution and continue 

 the artificial respiration and heart massage for ten min- 

 utes if the animal does not recover sooner. What treat- 

 ment would you advise for threatened death under an 

 anesthetic? How would you apply this treatment in a mod- 

 ern hospital? If the animal revives (it of course never 

 comes out from under the influence of the anesthetic) then 

 again clamp off the wind pipe and allow it to die of as- 

 phyxia. 



8. If time permits make the following dissections: Open 

 the chest by a median incision over the sternum. To do 

 this incise the skin and fascia down to the sternum, and 

 saw (Fig. 104) this through exactly in the median line. 

 (See Fig. 105.) Pull open the chest from side to side and 

 expose the lungs and heart (inside the pericardium). In- 

 flate the lungs. Open the pericardium and expose the 

 heart. Observe all the important structures in the chest. 

 Cut the phrenic nerves where they lie on the pericardium. 

 Could you make this dissection in a living animal? 



9. Carefully clean up the table, manometer tubing, can- 

 nulas, etc., and put away all your apparatus. It is im- 

 perative for each group to clean up its own apparatus after 

 each experiment. The animal must be put in a garbage 

 can or box with the others and should be burned in the 

 furnace at the power or heating plant. 



The records obtained during the experiment should be 

 labeled at once. The appearance of the record can often be 

 greatly improved by drawing a few straight lines horizon- 

 tally through the tracings by rotating the drum against a 

 stationary tambour pointer before the paper is removed 

 from the drum. (See Fig. 190.) Rough notes should be 

 made during the experiment. The record is varnished and 

 dried, and the permanent notes should be written up as soon 

 as possible. 



