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fibres of various sorts. The nerves, arteries, veins, 

 lymphatic vessels are the similar parts of our bodies; 

 the brain, heart, lungs, stomach, the dissimilar. Plants 

 are almost entirely composed of similar parts. The 

 vessels containing the sap, the trachcea, and utriculi, are 

 of this kind. These different vessels are pretty mii- 

 ibnnly dispersed throughout the whole body of tiie 

 plant: they enter into the composition of all its parts. 

 They are to be met with in the root, stalk, branches, 

 leaves, flowers and fruits. The least fragment, the 

 smallest leaf, is a representation of the whole, an abridge- 

 ment of the plant. 



There are likewise animals which are nearly composed 

 of similar parts. Of this number are many species of 

 long worm:-., ;ind some acquaiic millepedes, nettles^ and 

 sea-stars, polypuses, moths, earth-worms. Ail these 

 animals are i<> uied in such a manner, that each part of 

 them, even the smallest, corresponds in miniature lo the 

 whole iri all parts. 



In the long worms I just mentioned, we observe very 

 distinctly a s .. i; iach, a heart, and some very small ves- 

 sels which seem dependent on the latter. There is like- 

 wise no room to doubt that there is beneath the 

 stomach, a medullary string, like that observed in other 

 species of \ ;nus and caterpillars. Their viscera are 

 not distribu(<;vl into certain regions of the body ; they 

 are univei sally dispersed throughout its, whole length ; 

 so that we may truly aiiirm that these insects are all 

 brain, all stovuach, all heart. But this brain, stomach, 

 and heart, appear extremely simple : the first is scarce 

 any thing .norc thau a nervous piece of net-work, the 

 second a membraneous bag, and the third a grand 

 artery. 



Polypuses, which are more simple iu their structure, 

 are only a kind of bowel, 'sown with an infinite number 

 of small seeds, which are tinged with the colour 01 the 

 aliment. 



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