I hope that this pamphlet will not be without fruit. From what has been done, we can judge of what may be done, and inspired by the confidence imparted by the success of the three past years, I confidently trust that these facts will give the system of exchange a new impulse.
For this reason, I have determined to conclude the publication by the instructions prepared by the administrative professors of the Museum of natural history. Our American Brethren will be kind enough to follow the advice of these literati in prosecuting their researches, and sending their fruits.
I beg leave to recommend them to the particular attention of those societies and gentlemen in the new world who make natural history a special study.
The French and English languages being so familiar to the two nations, I thought it better to keep the following Documents in the language they were writt, fearing they might lose their originalety by being translated.
Paris, may 1846.
A. Vattemare.