124 A. M. Mayer on the Experimental Determination 
the source of sound, and whose ordinates gives the ratios of in- 
tensities between A, taken at the distances on the axis of 
abscissas, anc at distances from its sounding body always 
one half wave-length greater than A’s distance from its sound- 
ing body. The formula of the curve is 
oe? 
OS 
f the curve be placed up side down, and referred to the 
corresponding numbers on the abscissas and ordinates (the 
atter being equal to unity minus the numbers at the corres- 
ponding points of the curve when in its first position), we have 
the graphical representation of the variation of the resultant 1- 
tensities, contained in the fourth column of the table. 
7 g 
ppb ee tobe 
BERBER SSE 
i En { 
j het Sezheae as a 
i t 
aa 
Ba 
PC PERRE PERE REE EL TT Susesause seoage 
4 BRSG RSS ees2easacee PEER aE guae 
= aan a BRGSEREEELESe cusses 
I 2 3 4 5 6 i 8 y 10 LL 
n the case of notes of different pitch, giving the same amphi- 
tude of swing to the aerial particles, the higher note wil 
ntensity of Sounds of different Pitch, L. E. & D. Phil. Mag., 
Nov., 1872) Hence the determination of the relative intensities 
of notes of different pitch becomes very complicated, and the eX 
perimental solution of the problem is encompassed with maby 
difficulties. I however hope to be able, at some future day, 1 
present some work in this direction when I have succeeded 12 
