“…Other papers deal with visceral afferent mechanisms influenc ing respiration, (6,53,124,162,263,307,308,309,310,337,351) and with the reflex control of the diaphragm (75,314,371). Thorn ton (354) found that stimulation of the phrenic nerve in the cat produced broncho-dilatation, the afferent pathway of which is in the phrenic and the efferent one in the vagi.…”