Ketones. 



1500 (Jeueral. 



1510 Paraffin-ons. 



1520 Unsatui-ated open chain-ons. 



1530 Benzenoid-ons. 



1540 Eeduced beiizenoid and cyclic-ons other than 

 beiizenoid-ons. 



1550 Unclassified ketones. 

 Each of these divisions shali be subdivided according- to the 

 number of oxygen atoms present in the keto-componnd, further 

 subdivision being carried out as in the case of hydrocarbons. 



Amino-Compounds. 



1600 General. 

 1 6 1 Amino-paraffins. 



1620 Amino-derivatives of unsaturated open chain hydro- 

 carbons. 

 1630 iVmitio-derivatives of benzenoid hydrocarbons. 

 1640 Amino-derivatives of reduced benzenoid and cyclic 



hydrocarbons. 

 1650 Unclassified amino-compounds. 

 16(;o Imides, imido-ethers, Sic. 

 Each of the divisions 1010-1640 shall be subdivided into 

 monaniino- diamine-, &c., derivatives, which shall be arranged 

 as in other series. 



Hydroxylamine derivatives shall constitute a sub-section of 

 the monamino- ; hydrazine derivatives, amidines and amidoxinis 

 a sub-section of the diamino ; and diazoimide (NjH) derivatives 

 a sub-section of the triamino-deiivatives. 



Secondary and teitiary amines shall be enfered under the 

 primary amines from which the\' are derived. 



Ammonium derivatives shall be entered under the con-e- 

 speiiding amino-derivatives. 



Azo- Compounds. 



1 7U0 General. 



1710 Azo-corapounds (open chain). 

 1720 „ „ (closed chain), 



1730 Diazo-conipounds (open chain). 

 1740 ,, „ (closed chain). 



1750 Unclassified azo-C()m])Ounds. 

 Hydrazo- and oxyazo- compounds shall be eutei'ed under 

 corresjjonding azu-derival ives. 



All compounds containing the azo-grouping (i.e., disazo, &c.) 

 shall be classified in this section. 



The empiiical I'ormulai of the compounds in ihe divisions 1700 

 to 1750 must be yiven. 



