Traces of Solar Worship in North America

The Solar Semidiurnal Pressure Wave over North America

A geographical representation of the amplitude and phase distribution of the solar sernicliurilal pressure oscillation over North America shows clearly the amphidromic point expected here because of the superposition of the traveling and standing semidiurnal waves. It indicates also certain peculiarities in the phase :~nd amplitude distribution which may bc due t o orogritphic and coastal influ...

Admixture in North America

The history of North America has been marked by the encounter of populations from different continents. The discovery of the New World began a period defined by human migrations at a much larger scale than in previous history. This movement of people, voluntary or forced, changed profoundly the human landscape. As populations came into contact, admixture followed in varying degrees depending on...

Medicine in North America

Travel in North America

Landmark Study: The Relation of Solar Radiation to Cancer Mortality in North America.