OK, PLAIN TEACHING. 



193 



The woods, fields, gardens, streaks, 



PONDS, and SEA SHORES. 



- 2, 



542. 



Principles of Vegetation. 



Vegetables are organized 

 bodies, possessing a degree of 

 life. They increase their bulk 

 by assimilating with their bodies 

 various matters which surround 

 them in the air, water, and earth; 

 and they throw off germs which 

 spring up and resemble the parent 

 plants. Vegetables are con- 

 structed of two elementary sys- 

 tems, denominated cells, 1, and 

 vessels, 2, and these, variously 

 blended and combined, form 

 9 



several textures, called cuticle, 

 pith, barh, and wood. 



The form of the cells, 1, varies 

 not only in different plants, but 

 in different parts of the same 

 plant; united they form what is 

 called cellular tissue, and this 

 tissue enters into the composition 

 of every organ in the more perfect 

 plants. Of many herbaceous 

 plants it forms the chief portion, 

 and some of the lower tribes ox 

 vegetables, as the alga?, lichen$ 9 



