CONTENTS. 



Trne meaning of the word Askicvltvrb, page 1 



DiTuioa of bodiM into organic and inorganic subctancea, ... 4 



Organic tUmerda of planU. 



Carbon, 9 



H jdrag«n, 7 



Oxfgm^ • 



RibogaBf 11 



Inorganie part of planU, or aA. 



PMa^ 16 



Soda, 17 



Lime, . 17 



Magnaaia, 17 



Iron, .18 



Manganeae, ... 19 



Stitea, 19 



CUoriM, 90 



Salpkarie add... 91 



Fkoaphark aeid, . 99 



Yariatfaw in the compoaition of a«h, 98 



&Mrcw ^Ae t rgamie /ood ^ ptamtg. 



Carbonic acid gaa, •••*• tS 



Quantity of, in the atmoapher*, .» SO 



▲baorbad bj the laarea of plaitts, SI 



WvraUbm carbon to the plant, S8 



Caiboaalaodarivad fraaorfwaiaaabataaeaa bi^aett,.... SS 



8ew«aa of oxygaa and kvArafta of pteBta, S9 



Sowoaaof aiUogw of piMti, SS 



Amnosia. M 



Hitrkadd. . 37 



