Abstract
SUNSHINE-RECORDERS may be divided into two classes, viz., those which roughly measure solar energy by the burning of card and wood, and those which, by means of some photographic process, yield a record of the relative intensity of some more or less definite ray. The principle of the instrument which I am about to describe differs from those referred to in this respect—that it depends upon the evaporation of water in vacuo, and its indications are therefore readily expressible in heat-units.
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
CLARK, J. On a Radiant Energy Recorder . Nature 32, 233–234 (1885). https://doi.org/10.1038/032233a0
Issue Date:
DOI: https://doi.org/10.1038/032233a0