THE SPEECH OF MONKEYS. 1 87 



do this, but those made by man and simian alike 

 show modulation, not, however, equally distinct. 

 The notes of birds repeat alike both ways except 

 that their order is reversed. Again, to magnify 

 the sounds as I have shown it can be done allows 

 you to inspect them, as it were, under the micro- 

 scope, and this examination shows the contour of 

 the sounds of these two genera to resemble. 



Dr. Alexander Melville Bell has shown in his 

 work on " Visible Speech" that the organs brought 

 into use in the production and modification of 

 sounds must work in harmony with each other : 

 hence it is that by a study of the external forms 

 of the mouth the movements of all the organs 

 used in making any sound can be determined 

 with such certainty that deaf mutes can be and 

 have been successfully taught to distinguish these 

 sounds by the eye alone. And it was by such a 

 method that I set out to read the temple in- 

 scriptions from the ruins of Palenque some years 

 ago, at which time I had not heard of Dr. Bell's 

 learned and excellent work. The main feature 

 of those glyphs by which I was guided was the 

 outline of the mouth, which the artist had sought 

 to preserve and emphasize at the cost of every 

 other feature, and by this process I found, to my 



