CULATED WITH A TABLET OF A
PREPARATION SAID TO CONTAIN PURE CULTURES 128

44.--PHOTOGRAPH OF TEST-TUBES OF STERILE MILK INOCULATED
WITH A TABLET OF "LACTOBACILLINE" 130

45.--APPARATUS OF "LE FERMENT" CO. 129

46.--SOURED MILK APPARATUS OF THE MAYA BULGARE COMPANY,
LIMITED 130

47.--LACTIC FERMENTS, LIMITED, APPARATUS 131

48.--MESSRS. ALLEN & HANBURY'S SOURED MILK APPARATUS 132

49.--VIRONELLE APPARATUS FOR SOURING MILK, MADE BY
MESSRS. CLAY, PAGET & COMPANY, LIMITED 132

50.--"LACTOBATOR" MADE BY MESSRS. CHARLES HEARSON & CO.,
LIMITED 140

51.--MESSRS. HEARSON & COMPANY'S "LACTOBATOR" 142

52.--EDGAR'S "LACTOGENERATOR," SOLD BY THE DAIRY SUPPLY
CO., LIMITED 143

53.--APPARATUS OF THE WILLOWS REFRIGERATING CO., LIMITED 144

54.--"LACTO" APPARATUS OF THE DAIRY OUTFIT CO., LIMITED 145

55.--STERILISING APPARATUS FOR STERILISING MILK ON
THE LARGE SCALE 146

56.--ANOTHER METHOD OF STERILISING (DAIRY SUPPLY
CO., LTD.). AN AMERICAN APPARATUS FOR PREPARING
SOURED MILK 148

57.--AN AMERICAN APPARATUS FOR PREPARING SOURED MILK 149

THE BACILLUS OF LONG LIFE

CHAPTER I

INTRODUCTORY--HISTORICAL

The milk industry is one of the oldest known to mankind, and it is
difficult to imagine a time when milk in one way or another did not form
a part of the diet of the human race. There is a good deal of evidence
to show that in Paleolithic and Neolithic times, cattle were part of the
possessions of the nomadic races; and, according to the Vedas, the
manufacture of butter was known in India 1500 years B.C.

In the eastern part of Europe, milk has always been looked upon as one
of the principal kinds of food, but not necessarily the milk of cows,
as, from ancient times to the present day, the milk from camels,
buffaloes, sheep, and goats has been used indiscriminately throughout
the East.

According to Layard,[1] "the Bedouins do not make cheese. The milk of
their sheep and goats is shaken into butter or turned into curds; it is
rarely or never drunk fresh, new milk being