Zoolak, formerly called Matzoon, is a form of milk in which lactic-acid fermentation has been produced by a ferment much used in Syria. It has the same general properties and effects with koumiss, and is an excellent invalid food.

Intone is an unfermented milk preparation freed from fat, sterilised and rendered effervescing by means of carbonic-acid gas. According to the late Charles Rice, chemist of Bellevue Hospital, ioo parts by weight contain:

Fat

0.10

Casein and albumin

5.37

Milk sugar

5.80

Salts.....................................................

1.20

Water

87.53

100.00