It is dangerous to limit the freedom of any living organism to adjust itself to changing conditions. In particular, the freedom to move about and change position is essential, and to restrict it is to invite serious trouble. The mass of evidence on which this conviction is based continues to grow. It has been augmented recently by two significant publications.
Lillington and his associates1 used the techniques of bronchospirometry to study the functioning of the right and left lungs separately in five normal men. The experiment involved the introduction of a bronchospirometric catheter under fluoroscopic guidance after appropriate medication and the use of oscillometric galvanometers and a photokymograph. This made it possible not only to compare the rate of volume flow on right and left sides but also to compare the rates of nitrogen clearance during oxygen-breathing on the two sides in different positions. The results confirmed earlier reports