STATISTICS OF OBSERVATIONS. 43 



STATISTICS OF THE OBSERVATIONS. 



The clinical statistics of the 105 infants studied in this research 

 are given in table 8, with full data regarding birth. 



The results of the observations on the gaseous exchange of the same 

 infants are given in chronological order in table 9. The infants 

 included in this research are referred to throughout by numbers, but 

 in the first column of this table the initials have also been given for 

 such of the infants as were included in the previous report. 1 The 

 sex and the dates of the individual observations are given in the next 

 two columns. The length of the infant in centimeters, also the age and 

 weight for each observation, are given in succeeding columns, and the 

 actual length of each period from which the per hour figures are calcu- 

 lated is given under "Duration of period." The data for the prelim- 

 inary periods, i. e., the carbon dioxide produced per hour and the pulse- 

 rate, are shown by the first values given for each observation. These 

 values were not used in calculating the respiratory quotient for the whole 

 observation, only those in brackets (if more than one period was used) 

 being included in this calculation. The heat-production per 24 hours 

 is given on the three bases of total heat-production and heat-production 

 per kilogram of body-weight and per square meter of body-surface. 

 The pulse-rate is an average value for the several counts made during 

 each period. The data for the rectal temperature represent the records 

 made at the beginning and end of the observations. Prior to November 

 1914 the body-temperature was recorded about 30 minutes before the 

 measurement of the metabolism began. After November 1914 the 

 record was made approximately 3 minutes before the beginning of 

 the preliminary period of observation; this was always the routine 

 with the very young infants in the later observations. Temperature 

 records were usually taken within 5 minutes after the end of the 

 observation and always within 10 minutes. The data regarding the 

 feeding show the time between the taking of food and the beginning 

 of the metabolism measurements, also the kind and composition of the 

 food. Nearly all of the infants were normal, but a few were patho- 

 logical cases, these being indicated in the notes accompanying the table. 



Benedict and Talbot, Am. Journ. Diseases of Children, 1914, 8, p. 1, tables 13 and 15. 



