160 



Scientific Proceedings (127) 



TABLE IV. 



Normal relative values for the different lung volumes based on 27 

 observations. 



Total capacity... 

 Middle capacity. 



100 



02 



T 



Residual air. 



24.7 



Vital capacity 



75.3 



Reserve air 



37.3 



Complementary air. 



38.01 



T V — - 

 ^ 100 



73 (2033) 



Studies on lung volume. VII. Relation of size of chest to lung 



volume. 



By CHRISTEN LUNDSGAARD and KNUD SCHIERBECK. 



[From the Medical Clinic of the University of Copenhagen, Den- 

 mark.] 



In 1918 Lundsgaard and Van Slyke 1 worked out the quanti- 

 tative relationship between the different lung volumes and the 

 size of the chest (so-called chest volume) in 18 normal indi- 

 viduals. The size of the chest was determined as the product 

 ("chest volume") of three dimensions, the height, depth, and 

 width of the thorax. The ratio between the chest volume and 

 the lung volume in the corresponding position was found to be 

 55 for maximum expiration, 37 for middle capacity, and 19 for 

 maximum inspiration. We thought it would be of value to in- 

 crease the number of observations. We used the technique 

 described by Lundsgaard and Van Slyke in measuring the chest 

 dimensions and the total capacity. Complete mixture has always 



i Lundsgaard, 0., and Van Slyke, D. D., J. Exp. Med., 1918, xxvii, 65. 



