{ 69 3 
Explanation of the fyftemof mufical pipes, brought from 
the Ifle of Amfterdam in the South Sea, by Captain 
Fourneaux, to London, 17 74, from experiments 
made by Mr. steele. 
The manner of blowing thefe pipes, in making thefe 
experiments, was the fame as people ufe to whittle in 
the pipe hole of a drawer key. Of the tones, mark- 
ed on the drawing, the upper feries, which are exadt 
fifths to the lower, are eafiett produced by an unex- 
perienced perfon ; and the lower feries, which we will 
call fundamentals, with fomewhat more addrefs and a 
weaker blatt. Befide the above mentioned tones, if the 
velocity of the breath be increafed a little, the five firtt 
pipes will give o6taves to the fundamentals ; and if far- 
ther increafed, fliarp thirds, or tierces, above thefe oc- 
taves. In the pipes 6. ,7. 8. and 9. I could neither 
make the odfaves to the fundamentals, nor the ttiarp 
tierces ; but in their ttead, the minor, or flat-third, above 
the octtave came, when the breath was urged beyond the 
degree requilite to produce the fifth. This minor third 
is an accident out of the natural order of tones produced 
from Ample tubes, which I do not pretend to account 
for. Here following, are fet down the notes of the 
feveral tones which I produced from each pipe ; but, in 
order to bring them more within compafs of the fcale of 
five lines, they are written an o6tave lower than they 
K 3 really 
