NG OF MILK IN THE PYRENEES 8

THE CONSTITUENTS OF MILK 48

1.--MICRO-PHOTOGRAPH OF A DROP OF WHOLE MILK 58

2.--MICRO-PHOTOGRAPH OF SEPARATED MILK 58

3.--MICRO-PHOTOGRAPH OF CREAM 58

4.--PHOTOGRAPH OF TWO PETRI DISHES, WHICH HAVE BEEN
INOCULATED WITH ORDINARY MILK 60

5.--THE CREAMOMETER 62

6.--TESTING-GLASS FOR EXTRANEOUS MATTER IN MILK 62

7.--LACTOMETER AND TEST-GLASS 64

8.--PASTEURISER 78

9.--CONTINUOUS APPARATUS FOR THE PRODUCTION OF LARGE
QUANTITIES OF SOURED MILK 82

10.--A MILK-FILLING APPARATUS 90

11.--SECTION THROUGH A KEPHIR GRAIN 94

12.--_Streptococcus lacticus_ (GROTENFELDT) GROWING ON
LACTOSE-AGAR, STAINED BY GRAM'S METHOD 96

13.--PHOTO-MICROGRAPH OF PREPARATION FROM ARMENIAN SOURED
MILK (MATZOON) 106

14.--GRANULE BACILLUS FROM YOGHOURT. SHREDDED PREPARATION
OF A FRESH SKIM-MILK CULTURE 110

15.--GRANULE BACILLUS FROM YOGHOURT, CULTIVATED AFTER
THE USUAL AGAR METHOD 110

16.--GRANULE BACILLUS FROM YOGHOURT. AGAR MILK SUGAR
CULTURE 110

17.--_Bacteria W._ FROM MILK, CULTIVATED TWENTY-FOUR
HOURS 110

18.--AGAR MILK SUGAR CULTURE. FROM THE ORIGINAL BULGARIAN
YOGHOURT 112

19.--AGAR MILK SUGAR CULTURE. SURFACE COLONY OF GRANULE
BACILLUS FROM CALF'S STOMACH 112

20.--AGAR MILK SUGAR CULTURE. DEEP-LYING COLONY
OF GRANULE BACILLUS FROM CALF'S STOMACH 112

21.--AGAR MILK SUGAR. COLONY OF _Bacterium W._ FROM
YOGHOURT 112

22.--TWO COLONIES OF _Bacillus Acidophilus_ FROM CALVES'
MANURE 114

23.--BEER-WORT GELATINE 114

24.--SHREDDED PREPARATION OF BULGARIAN ORI