F ROND A (1925) presented data show-having a floor space of about 4 square feet, ing the diurnal variation at two-hourThe body temperature of each hen was intervals in the body temperature of sev-taken twice daily on 149 days during the eral breeds of chickens, and stated that period December 24, 1934, through August the temperature of the room had no ap-7,1935. One daily temperature reading was parent effect on the body temperature made between 8 a.m. and 10 a.m., and the curve. However, he did not state the room other between 3 p.m. and 5 p.m. Data were temperatures. In connection with data on also obtained in October, 1935, on daily the effect of air temperature on egg size, fluctuations in body temperature by taking Bennion and, Warren (1933) reported that readings at two-hour intervals during three the average body temperature of several different periods of 48 hours each. Leghorn females was more than 2°F. higher Body temperatures were taken by insertunder "high" air temperature than under ing a clinical thermometer in the rectum "moderate" air temperature, but they ap-to the depth of 1 inch and holding it there parently made relatively few observations. 1 minute. A small quantity of vaseline was It was considered of at least academic placed on the inserted portion of the therinterest to determine whether air tempera-mometer to prevent irritation of the rectum ture had any effect on the body temperature and adjacent areas. Air temperatures were of hens, and, since individual hen batteries recorded with another type of thermomwere being used to some extent, to deter-eter. mine also the effect of close confinement It might seem that the body temperatures on the body temperature.

T HE sequence in the time of laying of successive eggs in clutches of various sizes is used as a test of the accuracy of trap-nest records by inspectors in poultry record of performance work. Atwood (1929) observed that there was a high degree of regularity with which birds lay later and later in the day on succeeding days. He stated that if a bird had laid on successive days in the time sequence of 8 a.m.-10 a.m.-11 a.m.-12 m.-1 p.m. and then on the day following the last record an inspector should trap that particular bird at 9 a.m., the inspector would know quite definitely that the record for the preceding day was wrong. Atwood's observations were made; during the month of August in two successive years on a flock of White Leghorns fed normally.It seemed of value to determine whether such factors as age, feed, close confinement, or relative quantity of diet intake might affect the sequence in the time of laying, and to make such a study throughout a period of several months. Accordingly, time of egg production was recorded in connection with an experiment in which such varying factors occurred at the Southwest! Poultry Experiment Station, Glendale, Arizona.In the ensuing discussion reference is made to eggs being laid at certain specified hours. The specified hour is the hour of visiting the trap-nest, and the eggs actually had been laid between the preceding hour and that hour of visiting the trapnest. For instance, when it is stated that an egg was laid at 9 a.m. it actually was laid between 8 a,m. and 9 a.m. EXPERIMENTAL PROCEDUREAll the birds were housed in one building. They were trapped hourly beginning at 8 a.m. and ending at 5 p.m. from November 1 of one year through December 31 of the next year. However, only one of the fowls laid during every month of the entire 14month period.The data herein summarized were obtained from the following groups: (1) 46 White Leghorn hens and (2) 39 R. I. Red hens in their second year of production when the recordings were started. They were given feed ad libitum and confined to pens with ample floor space. (3) Eightyeight White Leghorn pullets in their first year of production when the recordings were started. They were given feed ad libitum and confined to pens with ample floor space. (4) Twenty-three White Leghorn pullets in their first year of production when the recordings were started. They were given feed ad libitum and confined to individual batteries with a floor space of approximately lj4 square feet each. (5) Two groups, each consisting of three pens of White Leghorn pullets in their first year of production when the recordings were started. In each group, one pen was given feed ad libitum, one pen received feed at the rate of 87 l A percent of the first pen, and the other pen received feed at the rate of 75 percent of the first pen. These data include the records of 44 pullets fed ad libitum, 44 pullets fed at the rate of 87>^ percent of that amount, and 43 pullets fed at the rate of 75 percent of that amount.All groups received the same all-mash ration.

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