1. The silver disk pyrheliometer;Abbot;Smithson. Misc. Coll.,1911
2. An improved waterflow pyrheliometer and the standard scale of solar radiation;Abbot;Smithson. Misc. Coll.,1932
3. New evidence on the intensity of solar radiation outside the atmosphere;Abbot;Smithson. Inst. Annu. Astrophys. Obs., App. 1,1922
4. On the atmospheric transmission of Sun radiation and on dust in the air;Angstrom;Geogr. Ann.,1929
5. On the atmospheric transmission of Sun radiation II;Angstrom;Geogr. Ann.,1930