BASAL KATABOLISM. 



97 



In table 12 the minimum metabolism is expressed first as the total 

 heat-production in 24 hours; second, as the heat-output per kilogram 

 of body-weight per 24 hours; and third, as the heat-output per square 

 meter of body-surface per 24 hours. To explain these values further 

 we have added the records for the body-weight without clothing, the 

 length, the age, the average rectal temperature, and the pulse-rate for 

 the periods of observation included in this table. 



TOTAL MINIMUM HEAT-PRODUCTION PER 24 HOURS. 



It will be seen that on the basis of the total minimum heat-production 

 per 24 hours new-born infants may range from 193 calories found with 

 subject 67 to a minimum of 95 calories found with subject 82. With 

 so large a number of values as are given in table 12 it is difficult to 

 discover any direct relationship between the body-weight and the total 

 heat-output. The results have therefore been represented graphically 

 in figure 4, in which the total heat-output per 24 hours has been 



5.0 



4.7 



4.4 



4.1 



3.8 



5 3-5 



3.2 



2.9 



2.6 



.- 



120 



170 



180 



190 200 



130 140 150 160 

 Calories per 24- Hours 



FIG. 4. Minimum heat-production of new-born infants per 24 hours referred to 



the body-weight. 



plotted against the actual body-weight of the individual infants at the 

 time the metabolism was measured. The approximate average value 

 is indicated in the chart by a heavy black line. As a matter of fact, 

 this line represents a value of 42 calories per kilogram of body-weight 

 per 24 hours. 



