DETERMINATION OF SIZE OF HEART BY X-RAYS 



455 



TABLE 8 



Body weight, average xveight of heart at various ages and relative heart weight after 

 W. Muller, body weight normal for a given age, relative weight of hearts studied 

 by Muller based on normal body weight and mean between relative body iveight 

 based on observed and that based on normal body weights 



CO & 



BODY 

 WEIGHT 



AVER- 

 AGE 

 WEIGHT 

 OF THE 

 HEART 



RELATIVE 

 WEIGHT 



Esri- 



MATED 

 NOR- 

 MAL 

 WEIGHT 



RELATIVE 

 HEART 

 WEIGHT 



BASED ON 

 NORMAL 

 WEIGHT 



MEAN 

 RELATIVE 

 WEIGHT 



1. Males 



Premature births, 

 Mature births. . . . 



1 month 



2- 6 months 



7-12 months 



2- 3 years 



4- 5 years 



6-10 years 



11-15 years 



16-20 years 



21-30 years 



31-40 years 



41-50 years 



51-60 years 



61-70 years 



71-80 years 



81-90 years 



Premature births 

 Mature births. . . , 



1 month. .^ 



2- 6 months 



7-12 months 



2- 3 years 



4- 5 years 



6-10 years 



11-15 years 



16-20 years 



21-30 years 



31-40 years 



41-50 years 



51-60 years 



71-80 years 



81-90 years 



grams 1 



7.06 

 20.79 

 16.19 

 20.13 

 30.64 

 52.7 

 65.2 

 103.6 

 163.8 

 236.9 

 297.4 j 

 289.6 ' 

 304.2 

 340.8 

 345.9 

 335.5 

 315.7 



0.0065 



0.00426 



0.0034 



0.0037 



0.0043 



0.0042 



0.0048 



0.0044 



0.0038 



0.0048 



0.0046 



0.0043 



0.0049 



0.0049 



0.0048 



0.0047 



0.0064 



0.0054 



0.0046 



0.0047 



0.0052 



0.0050 



0.00551 



0.0052 



0.0057 



0.00525 



0.0051 



0.0051 



0.0055 



0.0057 



0.0056 



0.0061 



2. Females 



0.0060 

 0.0038 

 0.0034 

 0.0039 

 0.0039 

 0.0044 

 0.0038 

 0.0047 

 0.0039 

 0.0040 

 0.0040 

 0.0043 

 0.0042 

 0.0048 

 0.0041 



0.0062 

 0.0051 

 0.0048 

 0.0050 

 0.0050 

 0.0052 

 0.0047 

 0.0051 

 0.0044 

 0.0045 

 0.0046 

 0.0050 

 0.0051 

 0.0051 

 0.0055 



