Solt introduces the two concrete poems by stating that the code poems are derived from the universal language of signs and symbols that have been used from ancient times to the present as taken from the subjects of the alphabet, astrology, astronomy, botany, chemistry, commerce, engineering, mathematics, medicine, music, physics, punctuation, runes, zoology, etc. She provides a key to the ideograms that render the rebus to be deciphered. -- Source of annotation: Marvin or Ruth Sackner.