Na ia faʻatautaia suʻesuʻega o matagi tetele mo le tele o tausaga i lenei taimi, ma lolomiina ai le muamua Europa matagi tetele o le tau i le 1917. Na ia tuʻuina atu foi faʻataʻitaʻiga faʻataʻitaʻiga ma faʻataʻitaʻiga. O le suʻesuʻega faʻasaienisi o lana malaga lona lua i Greenland (ice measurements, atmospheric optics, etc.) na faʻaauau pea i le faaiuga o le 1920s. Fesili: O le a le mea na taulaʻi i ai Wegener optics?
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