40 



different qualities, and of considerable value. That 

 produced from the leaves is called Oil of Cloves ; that 

 from the fruit is extremely fragrant, and of a thick 

 consistence, and at Ceylon is said to be made into 

 candles for the sole use of the king. The bark from 

 the root of the tree not only affords an aromatic oil, 

 which has been called oil of Camphor, but also a 

 species of Camphor which is purer and whiter than 

 common Camphor. 



The Cinnamon-tree is also cultivated in the islands 

 in the West Indies. 



RHUBARB. This plant is a native of Tartary 

 and China, near to the great wall. It blossoms in 

 April and May. Of this genus there are seven species, 

 but the root of the Rheum Palmatum is the drug that 

 is sold in the shops. 



It was first introduced into England in 1734 ; but 

 it was not till many years afterwards that it was un- 

 equivocally known to be the medicinal Rhubarb as 

 imported from Russia and the East. This plant is an 

 example of remarkably quick vegetation; the stem of 

 it, in three months, has been known to grow upwards 

 of eleven feet, and some of the leaves to five feet in 

 their longest extent. The root, which remains in the 

 ground during the winter, grows also to a very large 

 size; some have been produced in this country, of five 

 years old, that have weighed more than seventy pounds 

 in their fresh state. 



From the best experiments that have been made 



