RODDIE, I. C. 
MINUTES 
Figure 7. Oxygen saturation of blood from superficial forearm 
veins H and deep forearm veinsC3: forearm blood flow in the 
opposite forearm • . During the time represented by the rectangle, 
it was suggested to the subject that he was suffering from severe 
blood loss. (After Blair et al., J. Physiol. (Lond.). 148:633, 1959). 
Figure 8. Effect of stress on bloodflowthrough a normal • and 
a sympathectomized o forearm. At A, the subject performed a Val- 
salva manoeuvre, and during B, a mental arithmetic problem was 
given. (After Blair et al., J. Physiol. (Lond.). 148:633, 1959). 
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