292 A COMPENDIUM OF 
SUCCI, EXTRACTI, ET SACCHARA— 
JUICES, EXTRACTS AND SUGARS. 
This is a class of interesting substances which 
are partly or entirely soluble in water, and con- 
sist of secretions and concreted exudations of 
the plants from which they are obtained, With 
but a few exceptions, they are air dried; the 
exceptions are catechu, kino and sugar, these 
requiring heat in some form, Many of the juices 
exude spontaneously when incisions are made 
into the tree or plant, whilst others again re- 
quire great pressure. This class of drugs is 
devoid of cellular Structure, and none of them 
crystallize, except the sugars. I should here: 
mention that gutta percha, India rubber, and 
the sugars are insoluble in alcohol; the two first 
mentioned substances are insoluble in water, 
but are acted upon by chloroform, turpen- 
tine and bisulphide of carbon. Each drug will 
therefore be spoken of in a brief manner, from 
whence and how obtained; its constituents, 
adulterants, uses, doses, etc. 
