On one of these islands, we were told, the growing boys and girls had exceedingly high immunity to tooth decay. Their isolation was so great that a young woman of about twenty years of age who came to the Isle of Harris from Taransay Island had never seen milk in any larger quantity than drops. There are no dairy animals on that island. Their nutrition is provided by their oat products and fish, and by a very limited amount of vegetable foods. Lobsters and flat fish are a very important part of their foods.
Fruits are practically unknown.
It was necessary sometimes for us to engage skilled seamen and their crafts to make a special trip to some of these isolated islands. These seamen watch critically the tide, wind and sky, and determine the length of time it will be safe to travel in a certain direction under conditions existing in the speed of the running tide and the periodic change of the wind. These islands have been important in the whaling industry, even up to recent years. An important part of the study of these islands was the observations made on conditions at the fringe of civilization. A typical cross-section of the residents of the seaport town of Stornoway can be seen assembled on the docks to greet the arrival of the evening boat, the principal event of the community.