[ 770 ] 
recommend it, had not repeated Experience con- 
vinced me of its Ufefulnefs: And that it may be of 
Ufe to Pofterity, I mean to Phyficians that are really 
fuch, I give the Receipt of it to be given to the 
Piefident and Cenfors of the College of Phyficians, 
London. 
VI. A Letter from the Rev d Mr. Henry 
Miles to Mr. John Eames^ F. R. S. concern- 
ing the Seed of Fern. 
SIR > 
I N the Edition which the celebrated Boerhaav e 
and Gaubius have given us of Swammerdams 
Biblia Naturx, Jive Hijloria Infettorum , in Dutch 
z\\&Latin> 2 Vol. in Fol. printed at Leyden 1737- and 
1738. we have an Epiftolary DifTertation on the Seed 
of the Male Fern , together with a very curious Cur, 
reprefenting the Seed-vefTels, their Mechanifm, and 
the Seed, as viewed by a good Microfcope; inferted 
at the End of the faid Hiftory. The Cut I have at- 
tempted, with my unskilful Hand, to draw, as well as 
I could ; and, pofiibly, it may help you to conceive 
of the Form of what it isdefigned to reprefent, in fome 
meafure. 
The Author, I find, claims to himfelf the having 
firft difeovered the Seed of Fern , in his DifTertation, 
at the Beginning : “ You rightly judge ” (fays he to his 
Friend) “ me to have been the firft, " &c. Boerhaave 
fays, 
