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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
one-story hive and one two-story hive, all of which were left unpacked. 
In addition to these there were in each set a two-story hive placed in a 
packing box and insulated with four inches of packing beneath, six 
inches on the side, and eight inches on top. Each colony was requeened 
in August with a young queen and all of the queens used each year were 
from the same mother. In the two sets of hives — both the packed and 
unpacked — it was planned to leave sufficient stores to carry the colonies 
through until the honey flow began. In other words, it was attempted 
to have conditions in all of the colonies as nearly similar as possible in 
the fall of the year. 
As a standard of what constituted good wintering, it was agreed that 
those colonies which possessed the greatest number of bees at the be¬ 
ginning of the honey flow were those which had wintered the best. 
In the fall of the year, and again in the spring, the number of bees in 
each hive was determined by a system of weighing in which a pound 
represented 5000 bees. 
.The results of the first two years’ work with this experiment were 
published in the first paper. The results of the third years’ work 
i 
appeared in the second paper on this subject. As all of the results of this 
experiment have a similar trend, the data secured from the fourth years’ 
work, which have not been published, will be averaged with the data 
secured from the first three years’ observations. 
Table 1 presents an average of the data secured in the four years 
during which this experiment was conducted. 
Table No. 1 . — 'Average Winter Gain or Loss For Four Years 
No Windbreak Windbreak 
Date 
No. 2 
1-story 
Unpacked 
No. 16 
2-story 
Unpacked 
No. 4 
2-story 
Packed 
No. 5 
1-story 
Unpacked 
No. 6 
2-story 
Unpacked 
No. 7 
2-story 
Packed 
1917 
1918 . 
. -332 
2,808 
4,566 
4,538 
13,346 
15,132 
1918 . 
1919 
. -3,282 
469 
22,968 
313 
5,936 
24,844 
1919 . 
1920 
. 625 
-1,250 
5,625 
10,000 
8,125 
3,800 
1920 
1921 . 
. .-25,358 
-1,525 
* 
-8,800 
4,029 
47,575 
Average gain 
or Loss. 
. .-7,087 
-109 
11,053 
1,513 
7,859 
22,838 
*Hive number four was blown over by the wind during the winter of 1920-1921, 
and was eliminated that year. 
Where the result indicated is preceded by a minus sign, it signifies 
that there were fewer bees in the hive when it was weighed in the spring 
than in the fall. Where the result stated is a positive number, it indi¬ 
cates that there were more bees in that hive in the spring than in the 
fall. It will be noticed that during the winter of 1919-1920, neither 
