HERSCHEL, WILLIAM. - HEAT IS RADIATION

Additional Observations tending to investigate the Symptoms of the variable Emission of the Light and Heat of the Sun; with Trials to set aside darkening Glasses, by transmitting the Solar Rays through Liquids; and a few remarks to remove Objections that might be made against some of the Arguments contained in the former Paper. Read May 14, 1801.

(London, W. Bulmer and Co., 1801).

4to. No wrappers as extracted from "Philosophical Transactions" 1801 - Part II. Pp. 354-362 a. 1 engraved plate. The plates depicts the experimental apparatus.

First appearance of Herschel's paper on emission of the Light and Heat of the Sun
Together with this paper is: Thomas Andrew Knight, "Account of some Experiments onthe Ascent of the Sap in Trees.", pp. 333-352 a. 4 engraved folded plates.

Order-nr.: 42917