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Solarium

Each building contained a glass-encased porch, which faced southwards for maximum sunlight exposure.

Heliotherapy, or sunlight therapy, was made popular by a Swiss doctor named Auguste Rollier in the early 1900s. He was convinced early morning sun and cold air were beneficial to treating tuberculosis, although actual results were mixed. The treatment disappeared once the vaccine was introduced, although recent studies (2006) have shown an increase in vitamin D from the sun does in fact turn on an innate immunity to TB.

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