Portal:Supreme Court of the United States, w:United States Reports (1908)
“ A sheet of music is treated in the copyright act as if it were a book or sheet of letter press. Any mode of copying such a thing, whether by printing, writing, photography, or by some other method not yet invented, would no doubt be copying. So, perhaps, might a perforated sheet of paper to be sung or played from in the same way as sheets of music are sung or played from. But to play an instrument from a sheet of music which appears to the eye is one thing; to play an instrument with a perforated sheet which itself forms part of the mechanism which produces the music is quite another thing. ”
