12 ts Texas AGRICULTURAL EXPERIMENT STATIONS. 
A similar treatment was given colonies 322, 324, 325, 515 and 516; 
that is, the brood-chamber was increased 50 per cent in size, prior to 
the advent of the swarming fever, but in addition a super was also added 
above the enlarged brood-chamher. 
Colony No. 322.—On April 2nd the colony was strong and no queen- 
cells had been started. Two shallow extracting supers, both containing 
drawn-out empty combs, were placed above the brood-chamber. A wood 
and wire queen-excluding honey-board was placed between the two supers. 
The lower super served to increase the size of the brood-chamber by one- 
half, as the queen could lay in it at pleasure. The upper super was 
intended for storage of honey. At this time the light honey-flow was 
about equal to the daily consumption for brood-rearing. On April 12th 
it was found that the queen had not laid in the lower super and, instead, 
the bees had nearly filled it with honey, leaving the upper super still 
empty. The supers were accordingly reversed, bringing the empty super 
next to the brood-nest and the partially filled one above it, with the honey- 
board still between the two supers. On April 23rd it was found that the 
super next to the brood-nest contained honey, but no brood, while the 
upper super was again empty. The supers were accordingly reversed 
again. Up to this time no queen-cells had been built. The colony cast 
a swarm during the first week in May. 
Colony No. 324.—Very strong on April 3rd; no queen-cells. Two 
supers were given as in the case of Nos. 322 and 324. By April 12th 
many queen-cells had been built and the colony was ready to swarm. 
It was then used for another experiment. 
Colony No. 515.—Treated, on Apri! 8rd, in the same manner as de- 
seribed for Nos. 322, 324 and 325. No queen-cells were built prior to 
April 23rd, but cells were built and the colony swarmed about April 28th. 
Colony No, 516.—Very strong on April 3rd; no queen-cells. Treated 
in the same manner as Nos. 822, 324, 325 and 515. On April 12th the 
lower super contained honey, while the upper one was empty. The supers 
were reversed, so as to bring the empty one next to the brood-chamber. 
On April 22nd the colony had plenty of queen-cells and was ready to 
swarm. 
Thus, out of the five colonies that received 50 per cent additional room 
in the brood-chamber and an equivalent amount in super-room, four 
developed the swarming fever and one did not. 
A similar addition of two supers of empty combs was made to Colonies 
3238, 508, 512, 5314 and 518, but in the case of these the supers were added 
after queen-cells had been started and the latter were torn down at the 
time. In the case of all five colonies queen-cells were built again imme- 
diately and the treatment had no apparent effect on the swarming 
impulse. . 
In the case of the ten colonies (102, 103, 104, 320, 321, 322, 324, 325, 
515 and 516) which received the increase of 50 per cent in the capacity 
of the brood-chamber prior to the development of the swarming impulse, 
three did not swarm at all and in the case of the other seven swarming 
was apparently delayed for from two to three weeks. Strong colonies not 
treated in this manner swarmed, in most cases, during the first week in 
April, whereas most of the treated ones did not swarm until between 
April 20th and May 5th. For the seven colonies the treatment aid no 
