Each refrigeration equipment assembly was capable of maintaining any compartment on the refrigerator at either 0° F or 359 F, Each assembly consisted of a unit cooler, a condensing unit, refrigerant piping, valves, automatic controls, and other standard accessories, all completely prefabricated and factory assembled on an insulated plug-in panel. The unit coolers, which were blower type fin-coil evaporators, were equipped with heaters for electric defrost with controls so arranged that, when set to maintain in the refrigerator at 35° F, the evaporator was defrosted autoMatically each time the condensing unit turned off during its normal operating cycle. When set for 0° F, the automatic defrost operated once sach day to keep the evaporator free of ice, The condensing units were electric motor-driven, air-cooled reciprocating type, equipped with auto- matic controls to maintain each refrigerator compartment at the prede-" termined temperature. All motors were moistureproofed and fungusproofed for operation in the tropical location. See photographs which show two views of a typical plug-in refrigeration equipment assembly. When this refrigerator was designed in June 1949, it was intended to have food storage capacity sufficient to serve 600 men for 30 days, based on an assumption that the food consumed per man per day includes 3% pounds of perishable products and that the weight thereof is 40 pounds per cubic foot. On this basis, 600 men would require 63,000 pounds total for 30 days, and the necessary storage volume would be 1,580 cubic feet, net, Using an allowance of 33-1/3 per cent of the gross volume for aisles, waster space,etc,, the necessity gross volume would be 2,100 cubic feet. Since each compartment of the refrigerator contained 825 cubic feet gross, any three of the four compartments, having a gross storage capacity of 2,475 cuble feet, would theoretically suffice, leaving one spare com partment to allow for temporary outage in case of mechanical difficulty. In addition to this main storage refrigerator, in August 1949 a specification was written for the procurement of a three-compartment food refrigerator for the mess ball on Parry Island. This was a prefab- zicated, knockdown, walk-in type of similar construction to that described above. It differed only in size (19 feet, 0 inches long by 10 feet, 0 inches wide by 7 feet, 6 inches high, overall outside dimensions) and in the amount of refrigeration required. This was a single temperature re- frigerator (35° F design), and it waa therefore unnecessary to provide a separate refrigeration machine for each compartment, However, the single condensing unit selected and specified was identical with those furnished Yor the main storage refrigerator, in order to facilitate maintenance and repair and to reduce to a minimthe mumber of difference repair parts needed in stock. In September 1949, a specification was written to procure a beverage storage refrigerator for the recreation building on Parry Island. This was a two-compartment refrigerator of identical construction to that pre- viously described, Each compartment was designed to accomodate twelve dezen cases of bottled beverages and to cool this amount from 100° F to 55° F in ten hours. The refrigerating equipment of each compartment of this refrigerator was also specified to be identical to that furnished for the main refrigerator. The installation of the beverage storage refrig- 5-265