'Experiment on Aloe Americana Serratifolia, weighed' by Christopher Merrett Experiment carried out in 4 August 1656 Paper by Merrett regarding grafting bark of ash and sycamore trees back onto the trees themselves. Also includes an account of experiments with Aloe americana serratifolia demonstrating a degree of circulation occuring within the plant. Subject: Botany Published as two separate papers in Philosophical Transactions, the first titled 'Observations concerning the uniting of barks of trees cut, to the tree it self; made by Christopher Merret M. D. and read before the Royal Society January 9. 1666' and the second titled 'An experiment on Aloe Americana Serrati-folia weighed; seeming to import a circulation of the sappe in plants, by the same Dr. Merret'. Read to the Royal Society on 9 January 1667.