254 O/' See d s, 
Microfcope $ having nearly the fame Appear¬ 
ances as the Surfaces of the Seeds, with the 
Advantage of being tranfparent. This Duff 
is really the line Membranes that lay between 
the Seeds ; which, by the P re flu re of the 
Seeds againft them, have received Marks 
correfponding to the Ridges or Furrows on 
the Seeds themfelves. 
Seeds of the lefler Moon wort, of Tobacco, 
Lettuce,Thyme,Chervil, Parfley,and athou- 
fanb others, afford a delightfulEntertainment. 
The Ancients imagined thecapiliaryPlants 
and many other Rinds to produce no Seeds 
at all, and their Miftake could never have 
been rediifled by the naked Eye: but the 
Microfcope has difcovered, that all the feve- 
ral Species of Fern, Harts-tongue, Maiden- 
hair, &c. are fo far from being barren in 
this refpect, that they are amazingly fruit¬ 
ful : that the Seed-Veffels are on the Backs 
of the Leaves, and that the Duft which flies 
off when we meddle with them, is nothing' 
but their minute Seeds. Thefe Seed-Veffels 
appear to the naked Eye like a black or 
brown Scurf on the Back Side of the Leaf; 
but, when viewed by the Microfcope, refem- 
ble little circular Tubes, divided into many 
Cells containing Seeds. When the Seed is 
ripe the Veffels fly open with a Spring, and 
fpirt the Seeds out on every Side, in the 
Form of Duflc: and if at that Seafon fome 
of the Leaves are out in a Paper Cone, and 
that 
