CHAP. II. FUNCTION OF NUTRITION. 203 



the fair face of nature, and serve to nourish the 

 myriads of animated beings which people the earth, 

 the ocean, and the atmosphere. And lastly and most 

 incomprehensibly, from these same materials are con- 

 structed those organised substances which seem to 

 stand as portals to the intellectual and spiritual world 

 channels of direct communication by which reason 

 and revelation may tell the frail tenants of a few mould- 

 ering atoms, of that more glorious condition which will 

 as certainly be their heritage hereafter as their hopes 

 and yearnings after immortality are within the actual 

 experience of their present state. 



CHAP. III. 



FUNCTION OF NUTRITION CONTINUED Periods 5, 6. 



DIFFUSION OF PROPER JUICE (189.). INTERCELLULAR ROTA- 

 TION (193.). LOCAL CIRCULATIONS (195.). VEGETABLE 



SECRETIONS (196.). FECULA, SUGAR, LIGNINE (197.). 



PROPER JUICES (202.) TASTE AND SCENT (210.). EX- 

 CRETIONS (212.). ROTATIONS OF CROPS (218.). EX- 

 TRANEOUS DEPOSITS (219.). 



FIFTH PERIOD OF NUTRITION. 



(189-) Diffusion of proper Juice. THE crude sap hav- 

 ing been subjected to the action of the atmosphere and 

 the carbonic acid decomposed, the result is termed the 

 " proper juice" or elaborated sap of the plant. This 

 liquid has now to find its way back again into the 

 system for the purpose of nourishing and develop- 

 ing the various parts. There are three distinct kinds 

 of movement to which the proper juices of plants 



