up that flifpicion; 
and being con- 
firmed in the o- 
pinion, that the 
moft acute tones I 
could obtain from 
thofe four pipes, 
were minor thirds 
to the moft grave, 
I have ventured 
to mark thei;n fo. 
The reafon why 
there was room 
for my doubt a- 
bove mentioned 
is, becaufe the 
difference of hot- 
ter or colder, 
moifter or dryer, 
has a fenffble ef- 
fect on the acute- 
nefs or gravity of 
the tones. 
I am, SIR, tt^ith 
great regard, 
Your moft hum-* 
ble fervant, 
JOSHUA STEELE, 
