PERPENDICULAR CURD KNIFE 



HORIZONTAL CURD KNIFE 



A. 



CURD FROM MILK COOLED BUT NOT AERATED. 

 FROM MILK AERATED AND COOLED 



B. CURD 



SHOWING THE IDEAL WAY OF CARING FOR MILK IS IMMEDIATELY COOL- 

 ING WITH ICE OR COLD WATER WITHOUT AERATION OR EXPOSURE TO 

 THE AIR. THE NUMEROUS ROUND HOLES WHICH ARE SHOWN IN THE 

 PIECE OF CURD MARKED "b" ARE THE RESULT OF THE GROWTH OF GAS- 

 FORMING BACTERIA IN THE MILK. THE HOLES WHICH APPEAR IN THE 

 CURD MARKED "a" ARE NOT GAS HOLES BUT ARE MERE MECHANICAL 

 HOLES. THE FORMATION OF GAS HOLES IN THE CURD IS USUALLY 

 ACCOMPANIED BY VERY OBJECTIONABLE FLAVORS. 



