10 BULLETIN 1398, U. S. DEPARTMENT OF AGRICULTURE 
in the car Ree: ies United: States standard type of wire basket. 
Not only does this demonstrate its efficiency in cooling, but it also 
shows its economic value in its lesser ice requirement. In the first 
test, car A was supplied with 4,060 pounds and in the second test with 
3,634 pounds of ice less than car B, which may be considered a 
direct saving in ice meltage and a saving not made at the expense 
of the cooling eiliciency of the car. 
SUMMARY 
The United States standard specifications for refrigerator cars 
recommend wire-basket bunkers. 'To increase the efficiency of these 
bunkers, a divided wire-basket type has been devised which embraces 
the features of the United States standard wire-basket bunker but 
has less ice capacity and increases the meltage surface as the ice 
melts. 
To test the efficiency of this new type of bunker two tests were 
made in which two cars were used, one being equipped with the 
United States standard wire-basket bunker and the other with the 
divided wire-basket bunker. 
The car having the divided wire basket maintained temperatures 
equal to those maintained by a car of exactly the same construction 
except that it was equipped with a United States standard wire- 
basket bunker of larger ice capacity. 
This car proved to be economical in ice consumption, requiring 
4,060 pounds less ice in the first test and 3,634 pounds less in the 
second test. 
This saving in ice was not made at the expense of the cooling 
efficiency of the car. 
