s of Life_, by Reinhardt;
_The Secret of Longevity_, by an F.R.M.S.

[14] _Foods, their Composition and Analysis_, by A. W.
Blyth.

[15] _Dictionary of Applied Chemistry_, by T. E. Thorpe,
C.B.

[16] _Koumiss or Fermented Mares' Milk and its Uses, and
the Treatment and Cure of Pulmonary Consumption and Other
Diseases_, by L. Carrick, M.D., 1881.

[17] _Transactions of the Royal Society of Edinburgh_,
vol. i.

[18] Clarke's _Travels_, 1810.

[19] 1845.

[20] _Dictionary of Applied Chemistry_, by Thorpe.

[21] A leathern bottle.

[22] "I have brought forward Tchembulatof's receipt, which
differs from Bogoyavlensky's in the use of a larger
quantity of millet-flour, and in the boiling of the latter
apart from the milk. Dr. Postnikof's plan is the
following: Half a pound of millet-flour and a quarter of a
pound of malt are mixed with a sufficient quantity of
honey to form a paste, which is put into a clean jar,
covered with a linen cloth, and placed on a warm stove.
The mass soon begins to rise, and is then taken out,
wrapped in a piece of muslin, and dropped into a clean
earthenware vessel, containing about a quart of new mares'
milk, which is placed in the same temperature that the
paste was kept in. As soon as signs of fermentation begin
to show themselves in the fluid, the paste must be
removed, while the milk, after being stirred, should be
left in the same temperature till bubbles appear (only in
very small quantities) on its surface. The ferment is then
ready."

[23] _Food and the Principles of Dietetics._

[24] _Food and the Principles of Dietetics_, by Robert
Hutchison, M.D.

[25] _Bacteria in Milk and its Products_, by Conn.

[26] _Dict. App. Chem._, Thorpe.

[27] _Nature_, July 23, 1884.

[28] _The Exploration of the Caucasus_, by Duncan W.
Freshfield, 1896.

[29] Quoted by George M. Sternberg, M.D., LL.D.,
_Text-Book of Bacteriology_, 1898.

[30] _Encyclo. Biblica._

[31] Conn.

[32] _Cyclo. of Biblical Lit._, M'Clintock and Strong, and
Burckhardt's _Arabia_.

[33] _The Indian Medical Gazette_, Sept., 1909, "A New
Lactic Acid producing Streptothrix," by Gopal Ch.
Chatterjee, M.B.

[34] In their studies on Leben in the _Annales de
l'Institut Pasteur_ of 1899, Rist and Khoury, in speaking
of the amount of lactic acid produced by _Streptobacillus
lebenis_ in milk, say "Nous a