Fretless Instruments
The oud, often considered as an ancestor of the guitar, is a fretless instrument.
Fretless guitars are typically modified versions of factory-made traditionally "fretted" guitars, the frets being removed by the player or a professional luthier. There are also professional builders specialising in custom-made fretless guitars.
Fretless bass guitars are much more common than fretless guitars, and there are many manufacturers offering these as standard models.
Read more about this topic: Fretless Guitar
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“Being the dependents of the general government, and looking to its treasury as the source of all their emoluments, the state officers, under whatever names they might pass and by whatever forms their duties might be prescribed, would in effect be the mere stipendiaries and instruments of the central power.”
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