172 



OTTO C. GLASER 



Characterization, Animal I: At first many trial movements, then stopped inves- 

 tigating. In the end did not hurry out. Averages: first three trials, 8.16"; second 

 three trials 3.66". Improvement, 55.1 per cent. 



Characterization, Animal II: Accidental delay at second trial. Numerous 

 extra movements in fourth. In seventh gave up trying to get out, hence this record 

 is omitted in the averages. Averages : first three trials, 11.33"; second three trials, 

 3.33". Improvement, 70.8 per cent. 



Characterization, Animal HI: Slight delay in starting watch at eighth trial. 

 Averages: first six trials, 4.73"; second six trials, 1.60". Improvement, 66.3 per 

 cent. 



