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 breakfast, or as a dessert with grated stale bread and sugar spread over it.

The uses of buttermilk in making pancakes and for many other culinary purposes are mentioned in the chapter on "Milk Cookery."

Yoghourt or Bulgarian Sour Milk is prepared with a culture of bacteria originally found in Bulgaria where Metchnikoff, the late director of the Pasteur Institute of Paris, found people living to exceptional old age which he ascribed to the fact that their principal diet is sour milk of very high acidity.

The theory is that a luxurious growth of lactic acid bacilli, acting as a germicide, destroys other fermentations in the lower intestines. The bacilli active in Yoghourt require a somewhat higher temperature for their best growth than the lactic acid bacilli predominant in sour cream for the finest butter, a fact which must be taken into consideration in preparing the various products.

Dr. Elie Metchnikoff, author of "The Prolongation of Life"

FERMENTED MILK

In the preparation of Koumis, Kefir and other fermented milks of the same class, Yeast plays an important part, changing some of the milk-sugar into the alcohol which is found in these preparations in quantities up to 2%.

Koumis was first made from mare's milk by the Tartars, but is now prepared in this country from cow's milk by the addition of sugar and yeast. As carbonic