Copy of a paper about experiments with sap from trees by John Beale Experiments concern the ascent and descent of sap in different varieties of trees; how to obtain the greatest amount of sap from a tree; using the sap in brewing. Beale recounts similiar experiments, particularly concerning birch, carried out by Dr Jackson. Beale poses a number of questions speculating about what the findings would be if the experiments were carried out with maple 1 figure shows how to draw liquid from birch 1669