718 



DAIRYING. 



the milk hermetically, or as nearly so as possible, immediately upon 

 coming from the cow. 



Milk-cans for city supply are of various patterns. Some of the 

 most extensively used are shown in Fig. 936. The one in the mid- 

 dle, with a round top, is the pattern generally used in New York and 

 St. L,puis. The one at the left, with a smaller top, is in use in Phil- 

 adelphia, Baltimore, and Cincinnati. That at the right and rear of 

 the main group, with flanging top, is the Chicago pattern, while the 



Fie. 938.— M9k NKvery Wagon. 



little one on the extreme right is the Boston can. The usual size 

 for railway cans is forty quarts; the Boston can, however, ranges 

 from two to twelve* quarts, eight and a half being the size commonly 

 adopted. 



Mr. Frank K. Ward, of the Alderney Dairy, of Washington, D. 

 C, has devised perhaps the most complete delivery wagon in this 

 country, which is shown in Fig. 938. 



A useful contrivance, either for cooling milk before sending it 

 away, or for cooling it at the depots where it is stored for delivery, 

 is shown in Fig. 939. The milk is poured into the receiver A, and 

 after running in a thin stream over the outside surface of the series 

 of tubes, from B downward, is collected at the bottom, and has its 

 exit at C. The cold water enters by the pipe D, and passes upward 

 through the inside of the tubes, finally emerging at E, so that the 

 descending milk passes last of all over the tube which contains th» . 

 coldest water. 



