15 



remaining were subsequently fed diseased tissue from black- 

 head cases without result. On November 8 they were taken to 

 the country where they roamed freely, occasionally visiting hen 

 yards. On November 30 two of these turkeys became sick, and 

 when killed showed characteristic blackliead. 



From the above season's experience it may be concluded: 

 (1) that it is sometimes possible to raise young turkeys with a 

 common hen for mother; and (2) that exposure to hens and 

 henneries may result in blackhead, even after the turkeys have 

 grown to considerable size, — 7 and 8 pounds. 



Summer of 1010. 



Only one lot of turkeys were hatched during this season, and 

 all were used for inoculation purposes. Eggs were incubated 

 under common hens until the day before hatching, when they 

 were transferred to an incubator. Instead of placing the 

 newly hatched turkeys in the care of a hen they were placed 

 in a brooder to which they adapted themselves as readily as 

 young chickens. Nineteen normal young turkeys were hatched 

 from twenty-four eggs. When about six weeks old two were 

 suffocated from "crowding" in a poorly devised shelter during 

 a cold night, and soon after this two were killed by a cat, 

 leaving a flock of fifteen. Seven were inoculated when forty- 

 eight days old, and the others were used at ages from two to 

 three and a half months. One of the fifteen turkeys acquired 

 blackhead naturally. This was attributed at the time to ex- 

 posure to the seven inoculated birds, but, from what has since 

 been learned, may possibly have been due to the acquisition of 

 worms. 



The only practical bearing of this year's experience was the 

 demonstration of the ease with which young turkeys could be 

 hatched in an incubator and reared with a brooder in place of a 

 hen for a mother. The advantage of having a stock of turkeys 

 absolutely free from lice and other vermin is obvious. 



Summer of 1020. 



The data obtained from turkeys raised during this season at 

 the Medical School will be published in detail elsewhere. The 

 turkeys were raised as described for the previous summer. A 



