APPENDIX. 
In the following appendix will be found a number of 
papers which, by reference to the table of contents, on 
the preceding page, will be seen to be of much value, 
coming as they do from some of the most distinguished 
American and French investigators. 
The very interesting work of Doctor Adrien Sicard, of 
Marseilles, has been so embodied in the foregoing pages 
that it has seemed to me useless to occupy space in fur- 
nishing a complete translation of its contents. I have 
contented myself by giving a most valuable chapter, 
embracing his minute and philosophical studies into the 
intimate composition of the stalk of the Chinese Sugar 
Cane, which will commend itself to the attention of every 
intelligent reader. 
The French weights and measures of kilogrammes, 
hectares, metres, litres, &c., have been reduced into the 
American weights and measures, so as to be readily 
understood by all. 
CORRESPONDENCE. 
Copy.] Lecation or THE Unitep Stars, 
Paris, May 13, 1857. 
GENTLEMEN,— Your esteemed favor of the 28th March last was 
received and submitted to M. Alexandre Vattemare, the indefatigable 
friend of international exchange, especially with our country. 
He has addressed to me a letter, and placed in my hands eight 
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