Carbohydrates; Glucosid.es ; Resins. 



1800 General. {See also Q, UOO-UiO). 



1810 Monosaccharides. 



1820 Disaccharides. 



1830 Trisaccharides. 



1840 Carbohydrates otlier than mono- di- and trisacchar- 

 ides. 



1850 Glucosides. (See also Q 9135). 



1860 Resins. Unclassified neutral compounds. 



Compounds belonging to divisions 1810, 1820, 1830, shall be 

 subdivided according* to the number of oxygen atoms they 

 contain, and whenever necessary further subdivided as in other 

 series. 



Compounds belonging to divisions 1840, 1850, and 1860, shall 

 be entered alphabetically. 



Mixed Cycloids, 



1900 General. 



1910 Cycloids containing oxygen. 

 1920 „ ,, snlphur (or Se or Te). 



1930 „ „ nitrogen (or P). 



1940 „ „ several elements besides carbon. 



1950 Unclassified cycloids. 



Cycloids other than hydrocarbons, formed by the interposition 

 of one or more polyad elements other than carbon, shall be 

 arranged in this group — e.g., pyrone, thiophen, pyridine, piperi- 

 dine, pyrazole, uric acid, cyanuric acid, &c. 



Each of the divisions shall be subdivided according to the 

 number of polyad elements other than carbon present in the 

 compound. 



2000 Crgano-metallic and allied Compounds. 



All compounds of hydrocaibon radicles with elements other 

 than the halogens, oxygen, sulphur, selenium, and nitrogen, shall 

 be entered in this section in the alphabetical order of the 

 dominant elements. I'nder each element the order of 

 arrangement shall be as in other series. 



Alkaloids. 



3000 General. 



3010 Alkaloids derived from plants. {See also Q 9130). 



3020 „ „ „ animals. {See also Q 8485). 



Under 3010 a list shall be given of vegelo-alkaloids, together 

 with the Latin names of the plants frciu which they have been 

 obtained, arranged in the alphabetical order of the })lant names. 



In 3010 and 3020 alkaloh's shall be arranged alphabetically. 



