XX CONTENTS. 



Cllass II. Constituents of particular plants or families of plants. 



Page 



SECT. I. Piperin, asparagin, santonin, esculin, picrotoxin, 



anthiarin, caffein, coumarin, &c. . . 908 



Vegetable albumen and legumin. . . 912 



SECT. II. Neutral colouring matters. . . . 912 



Indigo, white or reduced indigo, sulphindylic, 

 anilic and picric acids, 'chlorisatin, aniline, 

 &c. ..... 912 



Colouring matters of archil, litmus and cud- 

 bear ; orcin, orceine, &c. . . 920 



Colouring matters of madder ; alizarin, &c., 



(principles of dyeing) . . . . 925 



Carthamin, hematoxylin, brezilin, berberin, 



quercitrin. .... 928 



CHAPTER VIII. 



Organic acids. . . . . 930 



SECT. I. Acids supposed to contain carbonic oxide. . 931 



Oxalic acid and oxalates. . . . 931 



Rhodizonic and croconic acids. . . 934 

 Mellitic acid. . . . .935 



SECT. II. Meconic acid and its congeners, comenic and 



pyromeconic acids. . . . 937 



SECT. III. Tannic acid and bodies allied to it. . . 938 

 Gallic acid, pyrogallic and ellagic acids, &c. . 940 

 SECT. IV. Citric acid, and the products of its decomposi- 

 tion, aconitic, itaconic and citraconic acids. 944 

 SECT . V. Tartaric acid and the products of its decompo- 

 sition, tartrelic, tartralic, pyrotartaric acids. 946 

 Paratartaric (racemic acid). . . . 950 



SECT. VI. Malic acid; maleic and fumaric acids. . 951 



SECT. VII. Kinic or quinic acid. . . . 953 



SECT. VIII. Volatile acids of butter ; veratric acid, &c. . 954 

 SECT. IX. Oily acids of butter of cocoa, nutmegs, and palm 



oil. ..... 956 



Margaric and stearic acids. . . 958 

 Distillation of margaric and stearic acids ; mar- 



garone. .... 961 



Action of nitric acid on margaric and stearic 



acids, suberic and succinic acids. . 962 

 SECT. X. Oleic acid and acids related to it ; sebacic and 



elaidic acid?. 964 



