
          Besides these are several others unknown which
 you will find among the specimens: And Dr. Cooley
 also has I believe discovered several new plants - 
 How many I know not.


 Accept my thanks Sir, for the pamphlet [DeAerolithis?]
 etc. I was gratified with the  clearness and
 conciseness of the reasoning in opposition to many favorite
 theories _ and in support of that which supposes "[aerolithis?]
 in ipsa atmosphaera esse genitos": But I confess I feel
 very little confidence in any of their theories. I formerly
 felt much interested in this subject and the more I examined
 it the more I was satified that we have not yet
 facts enough to establish any [?] hypothesis.


 I have but little opportunity to attend to natural
 history this summer - from the want of any books _ as I cannot
 carry any with me in my peregrinations _ What has
 become of the Prodromus? I had anticipated this much.


 I am in great haste and can say no more. If
 you should have occasion to write me please to make the
 direction to this place _


 Your much indebted humble
 servant


 Edward Hitchcock


 [at lower left: John Torrey M.D.]
        