282 (Nov. 2, 
you will kindly correct the mistake above shown and published in your 
Proceedings, and kindly insert the following, viz. : 
‘«« The Curators reported the safe return of the four-holed Mexican flutes 
or flageolets of terra-cotta, and the ‘‘pitch-pipes’’ or whistles of like ma- 
terial, which were borrowed and studied by Hillborn T. Cresson, who 
found that the first-mentioned four-holed clay flageolets could be made to 
produce the entire chromatic scale by proper manipulation and finger- 
stopping. The Mexican whistles or pitch pipes gave in regular succession, 
from tonic to octave, a full diatonic scale; also, a ninth, eleventh and 
twelfth existed, ‘‘the tenth being absent,”’ giving in allan octave and a quar- 
ter.’ 
“I regret to say that this is somewhat long, yet the facts deduced by the 
investigation of these instruments, owned by your honorable Society, 
prompt me to ask you to record them, merely claiming that they are in- 
teresting facts, and, if Tam correct, first noticed by myself. Please state to 
your Society that, for the past eight months, I have devoted my spare 
time to the arrangement and classification of the Mexican antiquities con- 
tained in the Poinsett and Keating Collection, and that I hope in a few 
weeks to have these unique specimens of art so arranged that they can be 
properly labeled and catalogued.’’ 
Pending nominations, Nos. 985 to 1006, were read. 
And the meeting was adjourned. 
Stated Meeting, Nov. 2, 1883. 
Present, 9 members. 
President, Mr. FRAuEy, in the Chair. 
After reading the minutes it was resolved that the Secreta- 
taries be instructed to cancel the concluding part of the rough 
minutes of the last meeting. 
Letters of acknowledgment were received from the Royal 
Society at London (102, 110 and 111 to complete set), and the 
Statistical Society, October 15 (112). 
A letter of envoy was received from the United States Naval 
Observatory. 
Donations for the Library were received from the Geological 
and Trigonometrical Survey of India, the Danish Society of 
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