M. Savélieff deduced for it a value of 3.47 from actinometrical observations made at.    From Wordnik.com.  [A Popular History of Astronomy During the Nineteenth Century Fourth Edition] Reference

Pouillet's result was not definitely superseded until Violle, from actinometrical measures at the summit and base of Mont Blanc in.    From Wordnik.com.  [A Popular History of Astronomy During the Nineteenth Century Fourth Edition] Reference

Halley's, 102; comet of 1843, 103; sixth star in "trapezium," 113; grinding of specula, 116; spectrum analysis, 136; solar photography, 145, 154; solar constitution, 151; shadow round eclipsed sun, 182; actinometrical experiments, 216; solar heat, 217; climate and eccentricity, 259; lunar atmosphere, 263; surface of Mars, 276.    From Wordnik.com.  [A Popular History of Astronomy During the Nineteenth Century Fourth Edition] Reference