Johannes Schiltberger,
The Bondage and Travels of Johann Schiltberger…
“ In front of the city of Miser, which the Christians call Cair, there is a garden where balsam grows; it grows there only, and in India. The king-sultan enjoys a large income from this balsam. The Infidels often adulterate it, and merchants and druggists also mix it, and this they do that they may make more profit. (23) Genuine balsam is pure and clear, and has a pleasant taste, and is yellow; but when it is thick and red, it is not genuine. Take a drop of balsam in the hand, and expose it to the sun; if it is good, you cannot keep it long in the sun, because you feel the great heat. ”
