The Preface. 
This, and the reft which follow, are placed, notin the 
order of Time; but more according to their Nature or 
Relation one to another. All of them intended as a 
Commentary upon fome particulars mentioned, cither 
in the Firft Leéture, or in the Idea, 
In the Plates, for the clearer conception oftthe Part 
defcribed, I have reprefented it, generally, as entire, as its 
being magnified to fome good degree, would bear. 
So, for inftance, not the Barque, Wood, or Pith of a Root 
or Tree, by it felf ; but at leaft, fome portion of all three 
together: Whereby, both their Texture, and alfo their 
Relation one to another, and the Fabrick of the whole, 
may be obferved at one View. Yet have I not every 
where magnify’d the Part to the fame degree ; but more 
or lefs, as was neceflary to reprefent what is fpoken of it, 
And very highly, only in fome few Examples, as in 
Tab. 40. which may fuffice to illuftrate the reft. Some of 
the Plates, efpecially thofe which I did not draw to the 
Engravers hand, area little hard and Riff: but they are all 
well enough done, to reprefent what they intend. 
