This section is from the book "A Library Of Wonders And Curiosities Found In Nature And Art, Science And Literature", by I. Platt. Also available from Amazon: A library of wonders and curiosities.
The Chinese name of this tea is vou-y-tchat that is to say, tea of the third kind, called vou-y. It takes its name from a mountain in the province of Fokien. There are three kinds of this tea: the first of which, called common Bohea, grows at the bottom of the mountain; the second, called congfou, or camphou, grows at the top; and the third, named saot-chaon, grows in the middle. These names in England are corrupted into congo, and souchong.
Bohea teas in general ought to be dry, and heavy in the hand: this is a sign that the leaves have been full and juicy. When infused, they ought to communicate to the water a yellow colour, inclining a little to green, which indicates that they are fresh, for old tea produces a red colour. Care must be taken above all to avoid red leaves, and to choose such as are large and entire. This is also a sign of freshness; for the longer tea is kept, the more it is shaken, which breaks the leaves, and mixes them with a great deal of dust. It sometimes happens, however, that the tea-dust is owing to the manner in which it is put into the box, as the Chinese tread upon it with their feet, to make the box hold a large quantity. The leaves of the cong-fou and saot-chaon ought to have a beautiful black shining tint, and to communicate to water a very bright yellow and a mild taste.
The Pekoe is a particular kind of tea-shrub, the leaves of which are all black on the one side, and all white on the other. As the real Pekoe tea is very scarce and dear, the Chinese adulterate it, by mixing with it some of the small half-grown leaves, as yet white, which grow on the top of the common Bohea tea. This changes the quality of the Pekoe, for these leaves being scarcely formed, can have very little sap or flavour.
 
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