Note 1 — Chapter XI · The Search Continued
Reading edition
Mr. Safford says in his article on the “Identity of Cohoba” (Journal of the Washington Academy of Sciences, Sept. 19, 1916): “The most remarkable fact connected with Piptadenia peregrina, or ‘tree-tobacco’ is that … the source of its intoxicating properties still remains unknown.” One of the bifurcated tubes.“in the first stages of manufacture,” was found at Machu Picchu.