A. M. Mayer— Researches in Acoustics. 107 
only two or three rows.* These hair-cell cords are more per- 
Pendicular to the basilar membrane than the Corti rods, and 
are also different in their forms, having swellings in the middle 
* It is to be regretted that no accurate measures of the lengths and diameters 
of the rods and cords of the organ of Corti have been secured. The outer pillars 
“a arch of Corti certainly double their length in going from the base to the top 
ductus; but does thi i 
the ; but d int them out as bodies suitably proportioned 
to co-vibrate to sounds extending isaoah at least eight octaves? I known of os 
sures on the hair-ce! dimensions are d 
: e 
gists will be able to give more precision to their hypotheses. 
