Plate, heat lamp by [John Tyndall] Sketch of a heat lamp used in examining the diathermy of various liquids. Ultimately published in paper as figure 2. For final drawing see PT/70/6/6. Subject: Physics Published in Philosophical Transactions as 'The Bakerian lecture.— Contributions to molecular physics.— Being the fifth memoir of researches on radiant heat'. Received and read by the Royal Society on 17 March 1864. [1864]