244 A. M. Mayer—Researches in Acoustics. 
After the experiments were finished I found that his determi- 
nations were about 5 per cent higher than mine. 
in the separate impulses into which the sound had been divided 
in order to produce the continuous sensation. 
NS) N | D | L 
UT, 64 py= 0625 sec, 40 
UT, 128 gpa 0384 “ 49 
UT 256 gry="0212 “ 54 
SOL, 384 = 0166 « 6-4 
' 512 te='0l28 “ 65 
MI 640 gy=Olll “ 71 
SOL, 768 | += 0091 “ 70 
1024 ree='0074 76 
E 
Although, at first sight, the apparatus which I have used in 
this research may appear coarse, yet experience showed that 
Cz Ui oro 
dise made 3? revolutions to one of the driving 
82 revolutions in the same time. It is evident that the appa- 
ratus readily detects this difference, especially as I often ran it 
during thirty seconds to obtain the number of beats striking 
ond 
‘Aich the imp i 8 en n intensity 
to cause discontinuity in the sensation. To obtain the ee the entire 
shone on We should have to know the ity of the sensation at the end of the 
al ve interval, and law giving the rate of diminution of € sensation. 
