Page:The story of milk.djvu/131

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Plain wooden vat and curd mill

Danish kettle and cheese vat

vat, although cheese may be made in a plain wooden tub or any other convenient vessel. The double bottomed vat generally used in American as well as in Danish dairies facilitates both the heating of the milk before setting and the "cooking" of the curd in the whey after cutting. Either low pressure steam, or—better—water heated by steam, is introduced in the space between the outer, wooden bottom and the inner, tinned steel or copper bottom. If it is cool the milk should be warmed to 86° F. In the summer it may be warm enough as it comes in, fresh from the cow. If not, heat it by steam or by setting it in a "shot-gun" can in another vessel of hot water, stirring frequently, until the thermometer shows 86°. It may be well to add a little buttermilk or sour whey from the preceding