TABLE I. — Pen I., Barred Plymouth Rocks,?. Observations made between 1.30 and 2.30 p.m. 
The figures at the left margin indicate the numbers of the hens, those at the top of each column the temperature of the air in the pen when the records 
were made, and those opposite each number the rectal temperatures in degrees centigrade. The row of figures at the bottom represents the mean rectal 
temperature of the eight hens that were under observation for two years, that second from the bottom the same for all the hens. 
116 
Proceedings of the Royal Society of Edinburgh. [Sess, 
Sept. 20. 
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