New York Agricultural Experiment Station. 



131 



damaging the threshold. As a further protection from the ice, 

 the walls and inside of the door of the ice-chamber are provided 

 with fenders of oak impregnated with paraffin. These fenders, 

 moreover, prevent the ice from slipping out of place, so that all 

 the water from its melting falls into the drip-pan. The ice-chamber 

 readily accommodates 200 pounds of ice. 



The lower door opens into the storage chamber. Just inside of 

 this door two galvanized iron doors are hung one above the other. 

 One of these is shown in section in Fig. 4. They are designed to 

 minimize the loss of cold air when access is desired to the upper 

 shelves of the storage chamber. The storage chamber contains 



Fig. 4 —Horizontal Section of Refrigerator and Incubator. 



(D'agonal hatching indicates cork-bmrd; other hatching, wood.) 



approximately 17^ cu. ft. The five shelves within it, as shown in 

 Fig. 2, are supported by runners of angle iron and are easily removed. 

 This arrangement of shelves affords about 27 sq. ft. of shelf space. 

 One of the shelves is designed for cooling gelatin plates. 



Construction of incubators. — As shown in Figs. 2-A, the four 

 incubators, each of 7 cu. ft. capacity, are built together as a single 

 unit. This arrangement, as well as the shape of the chambers, was 

 made necessary by the space available; but as a result the walls are 

 so thin as to allow some heat transference from incubator to incu- 

 bator, and the chambers so high as to bring about a difference of 

 one or two degrees in temperature between top and bottom. Had 

 each chamber been built separately, the insulation would have been 

 more complete and the incubators, at the same time, would have 



