John N. Xanthakis

1904

• Compendium in astronomy
• A study of the periodicities and climatic fluctuations of atmospheric ozone
• Geomagnetic field variation as inferred from archaeomagnetism in Greece and palaeomagnetism in British lake sediments since 7000 B.C
• Solar activity and a global survey of precipitation
• Solar physics
• The areas of sunspots in the two sun hemispheres