40 
ME.MOIII OF CAMFEU. 
levs state to be altogetliei' surprising, anti which Buf- 
fon has clearly established. Sometimes I have mv- 
self noticed, that the orang-outang, when enraged, 
utters hoarse and disagreeable sounds, and some- 
times, again, peculiar plaintive cries, which, I be- 
lieve, are produced by this singular apparatus.” 
This peculiarity of the organ of voice is illustrated 
by sketches and drawings made by the author him- 
self at the moment, according to his invariable prac- 
tice, Of the success and accuracy with which he 
performed this part of his task, we are able to form 
a tolerably accurate estimate, by the examination of 
the folio volume of plates accompanying his works, 
mostly prepared by liimself, and executed from the 
originals by the famous Vinkeles : it contains thirty- 
four plates, and several hundred figures. The in- 
valuable habit of minute accuracy of observation, 
derived from his practice of drawing, is well illus- 
trated by the following observation : “ M. Alla- 
mand,” he says, “ the illustrious Conservator of the 
Public Museum at Leyden, having published his 
work on the orang, sent me a copy of the plate 
which accompanied it. Upon examination, I found 
that he had distinctly delineated nails upon the great 
toes, as did also Mr Edwards, the Librarian of the 
London College of Physicians, in the work edited 
by him. On my calling his attention to the fact, 
M. Allamand immediately corrected his mistake ; 
and I speedily learned from a friend in the British 
Museum, that Mr Edwards had been alike incau- 
