Distilling the Art of Distillation in an Unstudied Manuscript of "Chymicall Notions".

This article focuses on a curious manuscript treatise in the British Library, Harley MS 6940, which the learned physician Samuel Bispham composed for the English patron and horseman William Cavendish (1593-1676), most likely in the mid-1640s. Sitting somewhere between a practical medical recipe book and theoretical chymical treatise, while being peppered with traditional causal explanations and Galenic precautions, Harley MS 6940 testifies to the erosion of the entrenched dichotomy between chymical and Galenic medicine in the mid-seventeenth century. Harley MS 6940 also lays bare how a learned physician used (and taught the use of) practice to confirm and sometimes challenge his learning, offering a counterpoint to recent scholarship that underscores the learning that apothecaries used to shore up their practice.

John Hill (1714?-1775) on 'Plant Sleep': experimental physiology and the limits of comparative analysis.

The phenomenon of 'plant sleep' - whereby vegetables rhythmically open and close their leaves or petals in daily cycles - has been a continual source of fascination for those with botanical interests, from the Portuguese physician Cristóbal Acosta and the Italian naturalist Prospero Alpini in the sixteenth century to Percy Bysshe Shelley and Charles Darwin in the nineteenth. But it was in 1757 that the topic received its earliest systemic treatment on English shores with the prodigious author, botanist, actor, and Royal Society critic John Hill's . As the present article aims to illustrate, Hill and his respondents used this remarkable behaviour, exhibited by certain plants, as a lens through which to reassess the nature of vegetables, and to address pressing questions of wider natural philosophical import, particularly the degree of continuity between the structures and functions of plants and animals and whether similar mechanisms necessarily account for related movements in different life forms.