The Cylindrical figure of trees is virtually contained and latent in this order. A Cylinder or long round being made by the conversion or turning of a Parallelogram, and most handsomely by a long square, which makes an equal, strong, and lasting figure in trees, agreeable unto the body and motive parts of animals, the greatest number of Plants, and almost all roots, though their stalks be angular, and of many corners, which seem not to follow the figure of their Seeds; Since many angular Seeds send forth round stalks, and sphæricall seeds arise from angular spindles, and many rather conform unto their roots, as the round stalks of bulbous Roots, and in tuberous Roots stemmes of like figure. But why since the largest number of Plants maintain a circular Figure, there are so few with teretous or long round leaves; why coniferous Trees are tenuifolious or narrow leafed, why Plants of few or no joynts have commonly round stalks, why the greatest number of hollow stalks are round stalks; or why in this variety of angular stalks the quadrangular most exceedeth, were too long a speculation; Mean while obvious experience may finde, that in Plants of divided leaves above, nature often beginneth circularly in the two first leaves below, while in the singular plant of Ivy, she exerciseth a contrary Geometry, and beginning with angular leaves below, rounds them in the upper branches. Nor can the rows in this order want delight, as carrying an aspect answerable unto the _dipteros hypœthros_, or double order of columns open above; the opposite ranks of Trees standing like pillars in the _Cavedia_ of the Courts of famous buildings, and the _Portico's_ of the _Templa subdialia_ of old; Somewhat imitating the _Peristylia_ or Cloyster buildings, and the _Exedræ_ of the Ancients, wherein men discoursed, walked and exercised; For that they derived the rule of Columnes from trees, especially in their proportionall diminutions, is illustrated by _Vitruvius_ from the shafts of Firre and Pine. And though the inter-arboration do imitate the _Areostylos_, or thin order, not strictly answering the proportion of intercolumniations; yet in many trees they will not exceed the intermission of the Columnes in the court of the Tabernacle; which being an hundred cubits long, and made up by twenty pillars, will afford no lesse then intervals of five cubits. Beside, in this kinde of aspect the sight being not diffused but circumscribed between long parallels and the ἐπισκιασμὸς and adumbration from the branches, it frameth a penthouse over the eye, and maketh a quiet vision: And therefore in diffused and open aspects, men hollow their hand above their eye, and make an artificiall brow, whereby they direct the dispersed rayes of sight, and by this shade preserve a moderate light in the chamber of the eye; keeping the _pupilla_ plump and fair, and not contracted or shrunk as in light and vagrant vision.