THE SENSE OF SMELL IN BIRDS 649 
finding the food at A. In this case D was entered once. The 
record of this result was written as follows: No. 92=B=D=C 
=B=C=B=C=A. This repetition of errors increased the size 
of the mean appreciably, at first, in the cologne series. In the 
following tables it will be seen that the means were significantly 
small when oil of bergamot was used, in spite of the fact that errors 
were repeated occasionally. 
TABLE 10 
Cologne series 
BIRD | MEAN dese 
Go eee Nate mS) s Lc. | 1.5483— 0.179+ 
SU tPA eee cee dea | 1.58 0.1578+ 
COE I Aa em OR ee. oh an le 708342 0.182+ 
lS I a shed a ee ore a ee | 1.9689-++ 0.189 
TABLE 11 
Musk series 
BIRD MEAN sea Co ey cae rg 
Gori ares ten ae AR TTL LGW, cree es 
Sill) a! 5! See OR a Ss A a Re | 1.447 
(7) so les eterra- ee eRES EGS cece aehee FR Re a | 1.549 
Pee schol BiG bere aE AO EL ae | TG 
TABLE 12 
Oil of bergamot series 
BIRD MEAN a a aS 
TEs eae kOe wee AW a 1.18+ 0.058 + 
SUD ers TR SA SN Sy oe IE EP CR Sth ay firs hana 1.369+ 0.0703 + 
OER TE oa ES NO or peas SEOs Hees 1.1938+ 0.0625+ 
Beaaien ssn tres Sentes 0.922— 
0.0663 + 
The totals of trials given the doves for different odors will be 
found in the following table: 
