30 
BULLETIX 1328, U. S. DEPAETMEXT OF AGKICULTUEE 
from -i.lo to 5.15 p. m.. the generous assiimj)tion may be made that all 
this error accmniilated between 4 p. m. and 7.30 p. m. Applying a 
correction under this assumption to the number of bees in the field 
and the returns for this period, it is found on calculation that the 
duration of the voyage has been increased by 0.39 minute, still show- 
ing that the average duration of the flight has been reduced after the 
occurrence of the threatening storm. This error, however, should 
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Fig. 12. — Graph represontiug flight data for July 10, 1922, a day of honey dearth 
properly have been distributed over the whole da}', so that its magni- 
tude was actually much below the above figure. 
In attempting to determine what factors are invoh'ed in this 
reduction in the duration of the trii)s, thi'ee things are suggested : 
(1) That the lower temperature prevailing after the storm stimu- 
lated the bees directly; (2) that the lower temperature and the 
conditions during and after the storm stimulated a relatively 
heavier secretion, enabling the bees to load more rapidly; or, per- 
haps. (3) that since fewer bees Avere visiting the flowers during the 
threatening storm, relatively more nectar was available to them on 
