Translocation of Ferrocyanide in the Sievetubes of Palmleaflets

In 1933 the author published an article on the bleeding of palm trees. One of the facts observed was the transport of a solution of ferrocyanide by the sieve-tubes of the bleeding stalk of an inflorescence. However, it was still a problem if this could be induced if conditions were more natural, the bleeding stalk being severely bruised and not in normal condition. Further experiments were therefore made by putting leaflets of the coconut-palm in an 1% aqueous solution of ferrocyanide. A fresh cut was made before the leaflets were inserted. After 10 to 15 minutes slices were cut out of the midribs at different levels and put into alcohol to which a few drops of ferrichloride had been added. The ferrichloride causes a deposit of prussian blue to develop in all places where ferrocyanide is present.