104 SECRETION. 



Camphor is obtained from the oils of Rosemary and 

 Marjoram, 12y from Sage, and 25 from Lavender. 



Products composed of Oxygen, Hydrogen, and Carbon ; 

 the Oxygen being in excess in relation to the Hydrogen 

 to form water. 



129. Under this head we can only mention a few of 

 the acids of most common occurrence in the vegetable 

 kingdom ; further details of them, as well as of all the 

 objects just noticed belonging more particularly to Or- 

 ganic Chemistry. 



Acetic Acid Destructive Distillation of Fibre. 



Tartaric Grape. 



Oxalic Wood Sorrel. 



Malic Currant. 



Benzoic Sweet-scented Vernal Grass. 



Gallic Oak or Gall-nuts. 



Hydrocyanic . Bitter Almond. 



Pectic Carrot. 



Lactucic Lactuca Virosa. 



Moroxylic Bark of White Mulberry Tree. 



Suberic Cork. 



Succinic Amber. 



Meconic Morphia. 



Kinic, Igasuric, etc., etc., etc. 



Certain products not included under the foregoing heads. 



130. Besides the Alkalis Potassa, and Soda, and the 

 Earths Lime, Alumina, Magnesia, and Silica, existing, 

 more or less in plants, (though it may be doubted 

 how far they are indebted to them by virtue of their 

 own elaborative acts) are certain products termed vege- 

 table alkaloids ; these have a very bitter taste, which 

 they sometimes lose in solution in water, but acquire 



