34 



CLASS I. METHANE DERIVATIVES: 



1. Hydrocarbons 



Saturated. 

 Unsaturated. 



2. Halogen Substitution Products of the Hydrocarbons. 



3. Alcohols 



Primary, Secondary, and Tertiary. 



Monatomic, Diatomic, Polyatomic (or monacid, etc.). 



4. Derivatives of Alcohols 



Esters. 



Sulphur Derivatives of Alcohols and Ethers. 



Inorganic Esters. 



Nitriles. 



Amines or Ammonium Bases, Hydroxylamines, and 



Hydrazines. 



Metalloid Compounds, Phosphorus, Arsenic, etc. 

 Metallic Compounds. 



5. Aldehydes and Ketones. 



6. Acids (monobasic, dibasic, tribasic, etc.). 



7. Derivatives of Acids 



Esters (ethereal salts). 



Halogen Substitution Products and Haloids of the Acid 



Radicals. 

 Acid Anhydrides. 

 Thio-acids and Anhydrides. 

 Acids Amides and Amido Acids. 



8. Cyanogen Compounds and Their Derivatives. 



9. Carbonic Acid Derivatives. 

 10. Carbohydrates 



Transition to the Aromatic Compounds 



1. Polymethylenes. 



2. Furfurane, Thiophene, and Pyrrol. 



3. Azoles, etc. 



CLASS II. BENZENE OR AROMATIC DERIVATIVES: 



1. Hydrocarbons. 



2. Halogen Derivatives. 



3. Sulphur Derivatives. 



4. Nitro Derivatives. 



5. Amido Derivatives. 



6. Other Nitrogen Derivatives. 



Diazo Compounds. 

 Azo Compounds. 

 Hydrazines. 



7. Phenols. 



8. Alcohols, Aldehydes, and Ketones. 



9. Acids. 



10. Combinations of the above classes. 



DOUBLE RING COMPOUNDS 



11. Indigo Group. 



12. Diphenyl and its Derivatives. 



13. Diphenyl-methane and similar compounds. 



14. Triphenyl-methane and Derivatives, including certain dyes 



1. Malachite Green Group. 



2. Rosaniline Group. 



3. Aurin Group. 



4. Eosin Group. 



