444 Dr. Davy on the Temperature, fyc., of Birds. [1865. 



the wings of the plucked fowl kept apart from the body, the wings of the 

 other in close contact with the body. The room in which they were sus- 

 pended was 53 at the time. From the great delicacy of the thermometer 

 used, about a minute and a half sufficed in recto to give a good result ; as 

 the same instrument was used, the trial was made alternately as to time ; 

 iu the first trial of the temperature beginning with No. 1, in the second 

 with No. 2, and so on. 



b- m 



March 29th. 10 2 A.M., air 53 No. 1, 107'25 No. 2, 108 



10 40 52 104 103 



11 54 52 97 87 

 1 P.M., air 52 90 72 

 24,, 52 87 66 

 37,, 52 85 62 

 42,, 52 83 61 



53,, 53 80 59-5 



6 35 50 75-5 55-5 

 9 50 50 68 52 



March 30th. 12 15 A.M., air 48 65 50'5 



8 30 49 55-5 48'5 



10 20 51 55 49 



12 15 P.M., air 53 54 50 



From the last of these observations it is seen how little was the cooling 

 effects from evaporation, the temperature of the plucked fowl rising a 

 degree, and differing one degree only from the air of the room. 

 Of the other trials made, one was on a drake, one on a tawny owl. 

 The drake, well covered with feathers, weighed seven pounds. It was 

 killed by drowning; the blood was retained. Like the fowls, it was 

 suspended by the legs ; its wings were apart. Previously its temperature 

 in recto was 107'5. The thermometer was left in recto. 



h m o o 



April 5th. 10 51 A.M., air 55 Drake 107-5 



., 11, 25 55 104. 



1 2 40 55 94. 



28 55 89-5. 



3 15 55 85. 



4 35 55 81. 



55 55 65. 



11 45 53 65. 



April 6th. 8 30 A.M., air 51 57. 



The owl was killed also by drowning. It had been fed the preceding 

 evening. On the 2nd of December, when alive, at 10.30 A.M., its tem- 

 perature in recto was 106- 5. Tho observations on its cooling were made 

 on it placed on a table, the bird resting on its abdomen, the wings close to 

 its sides j the thermometer was left in recto. 



