BOTANY* 213 



It abounds in the juice of the papau-tree, and is 

 likewise found in mushrooms, and in different species 

 of funguses. Albumen is common both to the ani- 

 mal and vegetable kingdoms, and most abundant in 

 the first. It may be distinguished by its property of 

 coagulation, by the action of heat or acids, after 

 which it is no longer soluble in water. 



Opium. 



Opium is very soluble in all acid menstrua. The 

 garden lettuce contains a milky juice, which, when 

 inspissated, has the character of opium, and cer- 

 tainly contains the same narcotic principle. 



Tea. 



In Great Britain, teas are divided into three kinds 

 of green teas, and five of bohea. 



The Green Teas are : 



1. Imperial or bloom tea. It has a large leaf, a 

 faint smell, and a light green colour. 



2. Hyson. Small curled leaves of a green shade, 

 inclining to blue. 



3. Singlo. Thus named from the place where it 

 is cultivated. 



Boheas, or Black Teas : 



1. Souchong, which, on infusion, imparts a yel- 

 lowish green colour. 



2. Camho. A fine tea, emitting a fragrant violet 

 smell, and of a pale shade. 



3. Pekoe. This is known by the small flowers 

 which are mixed with it. 



4v Congo. Has a larger leaf than the preceding 

 variety, and yields a deep tint to water. 



5. Common bohea tea, the leaves of which are of 

 a uniform green colour. 



