FAHRENHEIT, DANIEL [GABRIEL]. Experimenta circa gradum caloris liquorum nonnullorum ebullientium instituta. In: Philosophical Transactions Vol. XXXIII for the years 1724, 1725 pp. 1-7. London: Innys, 1726. 4to, modern quarter calf. FIRST APPEARANCE. "With the 'Experiments concerning the Degrees of Heat' Fahrenheit perfected the modern instrument, his principal innovation being a 'fixed point' of departure, namely the temperature to which water can be cooled when mixed with ice and salt." PMM 182. Sold as a periodical not subject to return.