400 



GASOMETRIC-MANOMETRIC METHODS 



Heatley (1940) described an improved model in which up to six 

 respiration chambers may be mounted on a revolving frame to 



A- 



Fig. 138. Respiratory chamber. 

 From Berenblum, Chain, and Heatley (1940) 



SECTION AB 



FRONT ELEVATION 



MEDIAN 

 VERTICAL SECTION 



r Rubber washer of 

 " F^ 7 5 uneven thickness 



REAR ELEVATION 



8 B A countersunk 



screw, holding 



B toA 



Rubber 

 washer 



Rubber washer of T_ 

 Circular glass window uneven thickness 



MEDIAN HORIZONTAL 4BA clearance slot 

 SECTION 



1 1 



(Dimpn<;ions m mm ) 



Fig. 139. Details of metal case for respiration chamber. 

 From Heatley (1940) 



ROTATING 

 BACK 



facilitate manipulation and measurement. Before the war the appa- 

 ratus was made by Unicani Instruments Ltd.; but at the date of 



