—Robert Froriep, Aspects of the Tongue,
                                     Bonn, 1828, translated by C. Garton and
                                     J. D. Gerencser
                               
I myself have drawn
With the utmost care and accuracy,
And have painted in color, all the pictures
Of tongues which I here submit.

 A pallid tongue:
         Often appears in hypochondria.
 A red tongue:
          A bad outlook.
 A very red tongue:
          The illness is of a bad kind.

 The very red/scarlet tongue,
 A very red/dark tongue:
     The color of smoke-cured beef.
 A black/purple tongue,
The blue tongue,
A yellow tongue,
A light white coating:
      Such a tongue would give very little ground for suspicion.
 The lardlike coating:
      Very often stupor follows.
 The yellowish or green coating:
       I dare not hazard an opinion.
 An ashen coating, 
A dark coating,
A black coating:
       Occurs with some frequency. I am at pains
To recall to mind that external irritation
And frequent respiration of dry air
Very easily dries out the mucous
Which normally makes the mouth glisten
And makes it black.

This it is was possible for me to observe
Especially on hiking expeditions
Of which I have made quite a lot.