Glass harmonica Franz Mesmer also played the armonica and used it as an integral part of his Mesmerism. An original Franklin armonica is in the archives at the Franklin Institute in Philadelphia, having been donated in 1956 by Franklin's descendants after "the children took great delight in breaking the bowls with spoons" during family gatherings. It is only placed on display for special occasions, such as Franklin's birthday. The Franklin Institute is also the home of the Benjamin Franklin National Memorial. A website has attempted to catalog publicly known Franklin-era glass armonicas. The Museum of Fine Arts, Boston has an early 19th-century
Glass harp popular in the 18th century. Pockrich's contemporary, Ford, published "Instructions for the Playing of the Musical Glasses" while Bartl published a German version. In 1929 Bruno Hoffmann invented a glass harp consisting, "of 46 individually tuned glasses fixed on a resonant table." On March 9, 1938, Bruno Hoffmann performed on the glass harp at the London Museum in a program including Mozart's Adagio (K. 356) and Quintet for harmonica, flute, viola, oboe, and cello (K. 617), accompanied by Geoffrey Gilbert, Leon Goossens, Frederick Riddle, and James Whitehead. It was an "exquisite performance, in which the flute and viola in their