CHICKS HATCHED FROM ALCOHOLIZED EGGS 135 



TABLE 11 — Continued 



Day 

 14 15 16 17 18 19 20 21 22 23 24 25 26 



No. of pecks made by 

 normal chicks 0121242511001 



No. of pecks made by 

 alcohol chicks 1033253403010 



INHIBITION OF AN ACQUIRED REACTION 



It will be remembered that the chicks of the fifth hatching 

 were used in Maze 2. This maze was a reversible maze so 

 constructed that after it had been used with the exit at one 

 side it could be turned over and present the same problem, 

 except that the exit would be at the other side, requiring the 

 chick to turn in the opposite direction from that in which it 

 had formed a habit of turning. Each chick of the fifth hatch- 

 ing was given ten trials in this maze (for record see Table 9) 

 and immediately thereafter the maze was reversed and the chick 

 given ten more trials. The chicks which failed successfully to 

 inhibit the previously acquired reaction were normal chick No. 

 2 and alcohol chicks Nos. 74 and 80. Chicks Nos. 10, 21, 51 

 and 72 made very poor records but these chicks, it will be re- 

 membered, had never acquired the proper reaction in the maze 

 during the first ten trials. They were equally unsuccessful when 

 the maze was reversed. These four chicks, it will be noted, 

 represent the four different groups of chicks obtained in this hatch- 

 ing. In the matter of inhibiting an acquired reaction these results 

 seem to give no pronounced advantage to any group of chicks. 



The following table gives the results for Maze 2 reversed: 



TABLE 12 



Chicks 2, 3, 4, 6, 10 and 14 Were Normal Chicks. Chicks 20, 21 and 25 Were 

 Hole Chicks. Chicks 41, 43, 47, 48 and 51 Were Water Chicks. Chicks 

 71, 72, 74, 80 and 81 Were Alcohol Chicks 



Trial 



No. of Chick 12 3 4 5 



2 8.5" 18 " 8.5" 10 " 7.5" 



3 1'34.5" 26.5" 10.5" 10 " 19 " 



4 2 " 2 " 4 " 3 " 3.5" 



6 6' 42. 5" 17 " 3' 28 " 39 " 26 " 



10 16.5" 3 " 13 " 4 " 14.5" 



14 4 " 2 " 3 " 2.5" 2 ' 



Average 1' 28+" 11+" 41+" 11+" 12+" 



