CONTENTS.

Pass

xii

Pyrometer.—Dilatation of Fluids.—Thermo-meter.—Dilatation of Elastic Fluids.—-AirThermometer.—Cold a Negative Quality.—Professor Prevost’s Theory of the Radiation ofMeat—Professor Pictet ’s Experiments on theReflexion of 1 Icat.

CONVERSATION III.

CONTINUATION OF TI1E SUBJECT. 4 7

Of the different Power of Bodies to conductIleat.—Attempt to account for this Power.—Count Rumford’s Theory of the non-conduct-ing Power of Fluids.—Phenomena of Boiling.

—Of Solution In general.—Solvent Power ofWater. —Difference between Solution andMixture.—Solvent Power of Caloric.—OfClouds, Rain , Dew, Evaporation, &c.—In-fluence of Atmospherical Pressure on Evapo-ration,

CONVERSATION IV.

ON SPECIFIC HEAT, LATENT HEAT, AND

CHEMICAL HEAT. S6

Of Specific Heat.—Of the different Capacitiesof Bodies for Heat.—Specific Heat not per-ceptible by the Senses. —How to be ascer-tained.— Of Latent Meat.—The Differencebetween Latent and Specific Heat. — Phe-nomena attending the Melting of lee and theFormation of A 7 apour.—Phenomena attend-ing the Formation of Ice, and the Condensa-tion of Elastic Fluids.— Instances of Con-densation, ami consequent Disengagement ofIleat, produced by Mixtures , viz. by theMixture of Sulphuric Acid and Water; bythe Mixture of Alcahol and Water; by the