SYNOPSIS The pyranometer of A. Ångström has been combined, at the observatory of Prof. Dorno, at Davos, with a recording device consisting of lamp, galvanometer, and a rotating photographic film, upon which the galvanometer deflection is recorded. In this way records are obtained of the total heat radiation from sun and sky upon a horizontal surface at all times of day, and from this record the daily sums are easily computed. In the present paper the recording method is described, the sources of error are discussed, and finally the results from the records at Davos are presented and compared with results of measurements at Washington and with the records of the brightness previously obtained by Prof. Dorno.