Mr. Vanderbilt, who built the Breakers mansion, had a thick
marble bathtub in his personal bathroom. It is pictured here. Marble is cool to
the touch. To make the bathtub warm, it had to be filled with hot water. The
heat quickly transferred from the water to the marble. The now-lukewarm water
was drained out of the tub and it was again filled with hot water. This process
was repeated several times until the tub was warm enough to keep the water
warm.
Mr. Vanderbilt’s bathtub had four spigots. Two were the hot
and cold water from the wells which supplied the house. The other two were hot
and cold water from the ocean – salt water. People thought soaking in salt
water was therapeutic. Have you ever soaked in salt water? If you dumped a lot
of salt into your bath water would it feel different? It is easier to float in
salt water. Can you float objects more easily in your salt-water bath than your
fresh water bath?
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