300 Inland Namgation of th. United States, 



Orleans and Lake Ponchartrain. This canal will not only be 

 valuable as a navigation, but as affording the means of divert- 

 ing the waters of that great river when swollen beyond its 

 usual size. 



In the newer states, great opportunities will no doubt be pre- 

 sented for extending an inland commerce, by the improvement 

 of rivers and the construction of canals. Years, however, must 

 elapse before their resources become adequate to such enter- 

 prises. Many have already been spoken of; but in this view 

 of the subject, however interesting to the neighbouring inha- 

 bitants, they can possess no claim to our attention. We have, 

 indeed, extended this essay so far beyond the limits within 

 which we at first hoped to comprise it, that a fear of becoming 

 tedious has prevented us from dwelling upon many points that, 

 in the views of those interested, may be considered at least as 

 important as those on which we have dilated. Those, how- 

 ever, who may wish to obtain more minute information than 

 we have given, will find it in a work on " The Internal Navi- 

 gation of the United States," published in Philadelphia, by 

 Carey and Lea, in 1826. To this we have been indebted for 

 many of the facts we have stated, that had not come imme- 

 diately under our own view, and have, in consequence, to make 

 our acknowledgments to the laborious and intelligent com- 

 piler of that work. 



To the Editor of the Quarterly Journal of Science. 

 Sir, 



The Illustrations of Nature published in your last number, 

 (VI.) extended to the confines of the animal reign. Perhaps 

 it might have been expected that illustrations of general 

 zoography should next have followed; but to illustrate the 

 animal kingdom generally, even in outline, would lead either 

 to a very extended or a very superficial essay; and as the 

 general view could be but faintly seen, and feebly understood, 

 unless particular associations were previously pointed out, I 

 have resolved to confine my present observations to a very well 

 marked series of animals; viz, apes and their allies; and 



