THE TABLES : EXPLANATORY 13 



If, on the other hand, the circumference of the chest 

 and the length of the trunk are markedly out of pro- 

 portion to each other, the weight obtained from either 

 the one or the other may be very considerably above or 

 below the actual weight found, although by taking the 

 two figures together as mentioned above the individual 

 will be found to have an absolutely normal weight ; thus: 



EXAMPLE 



MALE, AGE 27 YEARS 



I Weight of the body =100-5 kilograms. 



Observations J Length of the trunk =100-0 centimetres 



[circumference of the chest =105-5 centimetres 



CALCULATION 

 Weight derived from length of the trunk (100-0 cm.) 



= 89-78 kilos (from Table I.). 

 Weight derived from circumference of the chest (105-5 cm.) 



= 112-81 kilos (from Table II.). 



Averaging 89 ' 78 + 112 ' 8 ' = 101-3 kilos, which is the normal 



weight corresponding to the observed length of the trunk 

 and the circumference of the chest. 



Subtracting the calculated from the observed weight, 

 100-5-101-3 = -0-8 kilos. 



, -0-79 per cent 



Therefore the person weighs 0-79 per cent, less than he should 

 weigh according to the Tables. 



Difficulties in taking Measurements. It should 

 be noted that the calculated weights derived from chest- 

 measurements show greater individual variations than 

 those obtained from trunk-lengths. This is more par- 

 ticularly marked in the adult female owing to the difficulty 

 in obtaining successive measurements that are identical 

 on repeated examination, slight variations of level in the 

 application of the tape measure to the chest giving rise to 

 considerable variations in the measurements, owing to the 



