I have passed over these three treatises in a somewhat cursory fashion, because Nehemiah Grew's botanical work is perhaps better studied in his final pronouncement on the subject,--a folio volume published in 1682 under the title of "The Anatomy of Plants. With an Idea of a Philosophical History of Plants. And several other Lectures, Read before the Royal Society." This work consists of second editions of his three earlier treatises, largely rewritten, with a great deal of additional matter, including a section on the anatomy of flowers, and many new figures. Some of the plates are excellent, and especially remarkable for the way in which Grew shews the anatomy in drawings which represent the organ in three dimensions (Pl. 7). He himself laid great stress on this. In his own words, "In the _Plates_, for the clearer conception of the _Part_ described, I have represented it, generally, as entire, as its being magnified to some good degree, would bear.... So, for instance, not the _Barque_, _Wood_, or _Pith_ of a _Root_ or _Tree_, by it self; but at least, some portion of all three together: Whereby, both their _Texture_, and also their Relation one to another, and the _Fabrick_ of the whole, may be observed at one _View_." One cannot help wishing that botanists of the present day would more often take the trouble to illustrate their papers on this principle. [Illustration: _Plate VI_ A page from _The Comparative Anatomy of Trunks_, Nehemiah Grew, 1675. The annotations are believed to be in the author's own handwriting. [British Museum. Printed Books Dept. (_972.a.10_)]]