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culi : such are certain species of roots find sea-plants, 

 whose texture is almost together vesicular. It is the 

 same with those animals which seem to consist of 

 stomach only, as the polypus and type-worm. 



One of the principal characters by which we may dis- 

 tinguish insects from large animals, is, that the former 

 have no hone within them. What they have of a bony 

 or scaly nature is placed on their outside for a support 

 or defence to the more delicate parts underneath, or to 

 sustain the body with greater advantage. Thus we see 

 that in almost all insects, properly so called, the head, 

 corslet, legs, rings', &c. are either wholly, or for the 

 most part doubly covered with scales. 



Her Is differ from trees as insects from large animals. 

 They have no ligneous body in their centre. What they 

 have of a ligneous nature, appears on the outside, and 

 serves to protect the weaker parts of the plant. Thus 

 we find plants with tubes are strengthened by knots 

 placed at regular distances; so that tlie lowernff&t knoU 

 which are designed for the base, are stronger and nearer 

 each other than the upper ones. It is on the same ac- 

 count that the roots of many herbaceous plants, as well 

 as the calixes of flowers, and the capsules or coverings 

 of the seeds, are made almost ligneous. 



Her Is grow and become hard sooner than trees. In- 

 sects than great animals. Herbs and insects, being of a 

 softer consistence than trees and large animals, extend 

 themselves with greater case, and sooner arrive at the 

 peiod of their extension. Besides, the concentric beds 

 of the bark of trees, and those of the periosteum of 

 animals, being far more numerous than the relative beds 

 of herbs and insects, must needs require a longer time 

 for their growth. 



We may distinguish two kinds of parts in organized 

 bodies ; to wit, similar and dissimilar. The former 

 arc composed of libres of the same kind; the latter, of 



