136 



It appears that after the discharge has decreased in the NaCl solution, it again 

 increases in Fühner's solution + Oj. 



The other organ (2) has been kept in moist air hoin 4.10 until 6.47, then it 

 is put into Fühner's solution -f 0,. It becomes apparent that this organ also 

 shows a considerable increase in magnitude of the discharge after 30 minutes. 



The result of experiment 3 is therefore that Oo causes the shock to increase 

 and that sol. V. shows the same activity even though the discharge had been 

 weakened by an immersion in NaQl solution. 



Experiment 4 (Fig. 6 and Fig. 7). 



X- 



A Nitl 



A, NiCi 



B JJici 



JU- 



B. N.Cl 



Fig 6. 



Fig. 7. 



Preparation of small Torpedo (15 c.m.). 



Organ 1 (Fig. 6): At 3.53 in 3"/,, NaGl. Record A. After two hours record B. 



0.1 is now bubbled through the NaGl. After 30 min. record C 



Organ 2 (Fig. 7): At 4.50 in 3% NaCl. Record A^. After 70 min. record B^. 



NaOl replaced by Fühner's solution. After 30 min. record Cj. 



Result: Oo restores the discharge even if the organ remains in NaGl solution. 

 Sol. F. restores the discharge which has been diminished in NaGl. solution. 



Experiment 5. 



The preparations were made at 10.30 in the morning. 



Organ 1 : kept for 4 hours 40 min. in F. sol. poor in oxygen (boiled). 



Record a: deviation is 0,25 volt. After 14 min. exposure to the air. 



Record h: deviation is 0-31 volt. After the preparation had been kept for 28 min. 

 in well-aerated F. sol. 



Record c: deviation is 1,4 volt. 



Organ 2: kept for 4 hours 30 min. in F. sol. (O2 bubbling through). 



