5. _The Double Trill_ is formed of two long strains, divided by a cadenced pause, which is named the shake. They distinguish, 1. the common, subdivided into four; _a_, the strong, _b_, the clear, _c_, the long, and _d_, the short. These are heard sometimes in the woods and orchards; but chaffinches that sing _a_ or _b_ soon become the prey of our bird-catchers. 2. The double trill of Iambach[42]; this is only to be acquired in the house, and is so deep and powerful that one can scarcely conceive how the larynx of so small a bird can produce such sounds. It begins _piano_, and swelling its tones successively in _crescendo_, makes of the _trilling_ a strain of five piercing tones, afterwards repeats "_pfaff_" four or five times, and ends by dwelling on "_Rüdidia_." A chaffinch that possesses this song, either alone, or united with the good bridegroom's song, such as are educated in Iambach, sells here for eighteen French francs. 6. _The Gutjahr_, or good year song, is so named from the two last syllables, and is also divided, 1. into the common, that has but two strains, of which the second ought to roll five times before articulating "_gutjahr_." It is not uncommon in our woods. 2. The good year of the Hartz, which has been acquired in the house, and consists of two very singular strains, in my opinion not very agreeable. Chaffinches are very rare now which sing this, united to that of the wine song of Ruhl, or the sharp song, and their price is consequently high. They are rarely found but at Ersenach and Ruhl. 7. _The Quakia song_ is so called from its last syllables, and is double or single, one with one strain, the other with two. This song was formerly very much admired. It was heard in the woods and house, but it is now lost, as all the wild chaffinches that sung it have been taken, and those in confinement have been taught in preference the good wine song: I believe I possess the only bird that is now to be found which sings this. To be admired, the quakia must be united with the double trill. This my chaffinch sings also. 8. _The Pithia_ or _Trewethia_, is a very uncommon and agreeable song, which is never heard but in the depths of the Thuringian mountains. The bird-catchers of the villages about the forests of Hesse seek for birds that possess it, and actively pursue the songsters. It is first a sonorous strain, followed by several repetitions of the word "_zack_." Some birds unite to it the common sharp wine song, and are more valued. The last syllables ought to sound "_trewididæ_."