1915] Andrews: Turtles Discriminate Between Sounds 
191 
TABLE I 
Showing the behavior of turtles from July 29 to September 6, 1915, +- indi- 
cates that food was taken , — that it was refused. A shock was received when- 
ever food was taken while the whistle was blowing. Blank spaces after 
August 15, indicate that the turtles were not fed. 
DATE 
TURTLE NO. I 
NO. II 
NO. Ill 
NO. IV 
NO 
. V 
Bell 
Whistle 
Bell 
Whistle 
Bell 
Whistle 
Bell 
Whistle 
Bell 
Whistle 
July 29... 
+2 
+2 
+2 
+2 
July 30... 
+2 
+2 
+2 
+2 
July 31... 
+2 
+2 
+1, -1 
+1, -1 
Aug. 1.. 
+2 
+2 
+2 
+2 
Aug. 2.. 
+2 
+2 
+2 
+2 
Aug. 3.. 
+2 
+2 
+2 
+2 
Aug. 4 
+2 
+2 
+2 
+2 
Aug. 5.. 
+2 
+2 
+2, -2 
+2, -2 
I 
Aug. 6.. 
+4 
+4 
+5, -1 
+4, -2 
| 
Aug. 7.. 
+6 
+6 
+5, -1 
+5, -1 
Aug. 8.. 
+6 
+6 
+6 
+4, -2 
+3 
+3 
Aug. 9.. 
+6 
+6 
+6 
+4, -2 
+3 
+3 
Aug. 10. . 
+6 
+6 
1 
+ 
+6 
+2 
+2 
+6 
+6 
Aug. 11. . 
+6 
+6 
+6 
+5, -1 
+2 
+2 
+6 
+6 
Aug. 12.. 
+6 
+6 
+6 
+5, -1 
+2 
+2 
+5, -1 
+5, — 1 
Aug. 13. . 
+6 
+6 
+6 
+2, -4 
+3 
+2,-1 
+6 
+6 
Aug. 14. . 
+6 
+6 
+6 
+2, -4 
+3 
+2, -1 
+6 
+6 
Aug. 15. . 
+6 
+6 
+6 
+1,-5 
+3 
+3 
+3, -3 
+ 
1 
+4, -2 
+4,-2 
Aug. 16. . 
+6 
+4,-2 
+6 
+2, -4 
+2, -1 
+2,-1 
+6 
+5, -1 
Aug. 17. . 
+6 
+4, -2 
+4, -2 
+2, -4 
+3 
-3 
+6 
+6 
+5, -1 
+6 
Aug. 18.. 
+6 
+3, -3 
+4, -2 
+1, -5 
+3 
-3 
+2, -4 
-6 
Aug. 19. . 
+6 
+2, -4 
+5, -1 
+1, -5 
+5, -1 
+2, -4 
+2, -4 
+1, -5 
+3 
-3 
Aug. 20.. 
+6 
+1, -5 
+5, -1 
+1, -5 
+4, -2 
+4, -2 
+1, -5 
+1, -5 
Aug. 21.. 
+6 
+1, -5 
+4, -2 
+4, -2 
+4, -2 
+1, -5 
+3 
+1, -2 
Aug. 22. . 
+3 
-3 
+6 
+1, -5 
+5,-1 
+1, -5 
Aug. 23. . 
+3 
+1, -2 
+6 
+1, -5 
Aug. 24. . 
Aug. 25.. 
+3 
+1, -2 
+5, -1 
+4, -2 
+4, -2 
+4,-2 
Aug. 26. . 
+2 
+1, -1 
+6 
+3, -3 
+4, -2 
+4, -2 
+6 
+4, -2 
Aug. 27.. 
+4, -2 
+3, -3 
+5, -1 
+2, -4 
+2, -4 
+5, -1 
+6 
+3, -3 
Aug. 28. . 
+6 
+2, -4 
+6 
+2, -4 
+3,-3 
+5, -1 
Aug. 29.. 
+6 
+4, -2 
+6 
-6 
+2, -4 
+6 
+5,-1 
Aug. 30. . 
+5, -1 
+1, -5 
+5, -1 
-6 
+6 
+1, -5 
+6 
+4, -2 
Aug. 31. . 
+5, -1 
+1, -5 
+6 
-6 
+6 
+1, -5 
+6 
+1, -5 
Sept. 1.. 
+6 
-6 
+6 
+2, -4 
+6 
+2, -4 
+5, -1 
+1, -5 
Sept. 2.. 
+6 
+ 
1 
+6 
-6 
Sept. 3.. 
Sept. 4.. 
Sept. 5.. 
+5,-1 
+2, -4 
+6 
+1, -5 
Sept. 6.. 
+6 
+1, -5 
+6 
+5,-1 
+6 
+1, —5 
Sept. 21.. 
+6 
+6 
After the sound experiments were begun the turtles were never 
fed except on the zinc plate. This was connected so that it might 
form one electrode of an electric circuit. When the current was 
