INTRODUCTION, Qg 
_ need not be pursued further; it is sufficient to say 
_ that the vascular Acrogens are Ferns, and the cellus 
lar Acrogens, Mosses, 
It next becomes desirable to consider the structure 
of Ferns, with a view to the intelligible designation 
of the several parts. In my descriptions I have 
endeavoured, as far as possible, to combine simplicity 
with uniformity; I have never used a technical or 
Latin word when I could find an English one that 
would answer the purpose; but there are occasions 
when it becomes absolutely necessary to use words 
that do not occur in our old dictionaries; and these 
are when we have occasion to speak of objects of 
which the compiler of the dictionary was totally 
ignorant, and it is thus with Ferns: in describing 
them with precision we are compelled to mention 
objects totally unknown to Dr. Johnson and the 
earlier lexicographers, although introduced into that 
Inyaluable work, «A Dictionary of the English Lan- 
guage, by Noah Webster, revised and enlarged by 
_ Chauncey A. Goodrich.” In this, every term I have 
employed will be found, accompanied by an admirable 
explanation, But as many of my lady readers may 
