original_query: What were the key features of the Meyer flute in the 19th century?
query: What were the key features of the Meyer flute in the 19th century?
answer: The Meyer flute, popular in the mid-19th century, had up to 12 keys and a body made of wood.  The head joint could be either metal-lined ivory or wood. It combined features of traditional keyed flutes and Viennese flutes, becoming common in Europe and America by the end of the century.