104 PHILOSOPHICAL TRANSACTIONS. [aNNO I673. 



vours about the anatomy of plants, (of which an account was given in Num. 78 

 of these Tracts,) being resolved upon a further prosecution of them, has given 

 us the series of his thoughts and observations following thereupon in this his 

 second book, distributed in three parts. 



The first contains the author's idea or design of a phytological history. In 

 order to this, five requisites are proposed. The first is a particular and compa- 

 rative Gurvey of what relates to the more external consideration about vegeta- 

 bles ; as of their figures, proportions, seasons, places, motions. The second a 

 like survey of the organical parts by anatomy, and how that is 'to be prosecuted, 

 both without and with a microscope ; from thence we may come to know, what 

 the communities of vegetables are as belonging to all; vi'hat their distinctions to 

 such a kind ; their properties to such a species ; and their particularities to such 

 particular ones. The third, another similar survey of the contents of vegeta- 

 bles ; of their several kinds, as spirits, airs and vapors, clear saps, milks, oils, 

 gums, sugars, salts, &c. examined in all manner of ways. The fourth means a 

 like survey of the principles as well as the contents of the organical parts. 

 Whence will be attainable a further knowledge of the modes of vegetation, and 

 of the sensible natures of vegetables, as also of their more recluse faculties and 

 powers. The fifth, a like survey of those bodies, either from which these prin- 

 ciples are derived, or wherewith they have any communion ; which are earth, 

 and all solid receptacles; water, and all liquid receptacles; air and sun. All 

 which our author concludes with putting the question once more, viz. In what 

 manner these principles are so adapted as to become capable of being assembled 

 together in such a number, connection, proportion and union, as to make a vege- 

 table body ? 



The second part is a continuation of the anatomy of vegetables, particularly 

 prosecuted upon roots ; as l.The skin, its external accidents and original, its 

 compounding parts, the one parenchymous, consisting of bubbles, the other 

 ligneous, consisting of tubulary vessels. 2. The bark; its original and external 

 accidents, its compounding parts, likewise parenchymous, and ligneous; which 

 latter consists of succiferous vessels, conjoined in threads, but no where inoscu- 

 lated, nor ramified, but distinct as the fibres of a nerve, which vessels are of 

 various kinds, denominated from their contents, as lymphaeducts, lacteals, &c. 

 3. That portion of the root within the bark, of the like composition with the 

 former, and its ligneous part, compounded of succiferous and air-vessels. Where 

 the structure of the bark, and more visibly of this portion of the root, is com- 

 pared with that of a muscle; and the air-vessels with nerves : concerning which 

 latter vessels he observes, with the excellent Malpighi, the spiral position of 

 their parts ; adding to that observation, that that spiral zone, as Signor Malpighi 



