Find out information about ciliate. phylum in the kingdom Protista Protista or Protoctista , in the five-kingdom system of classification, a kingdom comprising a variety of unicellular and... Explanation of ciliate
Sadly, the early history of Western free reed instruments is somewhat cloudy, but if we are defining the harmonica as a mouth-blown free reed instrument where the notes of the scale are selected by the player's mouth, rather than fingers, the usual answer to this question is that it was invented by sixteen year old Christian Buschmann in 1821.
My own harmonica has plenty of skin cells on the mouthpiece, so who knows what's inside the body of the harmonica, says a Wikibooks contributor. That being said, a harmonica is not an expensive instrument, so you do not have much reason to go for a second hand, unless, as stated, you need a special variety.