These boxes, or groups of boxes, would be constructed, in the United States, of sections of such size as to be easily handled, and identified so they could be assembled quickly and correctly in the field by unskill- ed labor, The refrigeration equipment for each box would be factoryassembled and tested and would be mounted on a plug-in section, which could easily be inserted into or removed from the box in the field. Since the refrigerator equipment plug-ins would all be identical and interchangeable, the provision of a few spare units would facilitate greatly the maintenance of the equipment for individual boxes, In case of break-down of an individual refrigerating unit, the installed plug-in could be removed from the box and the spare inserted, quickly, and with a minimum of effort, The defective equipment could then be removed to the refrigeration main~ tenance shop to be repaired and made ready to insert in the place of another unit in case of breakdown. In this way, continuity of service could be maintained to a high degree, and loss of service due to mechanical or electrical difficulties' could be reduced to a minumm. Accordingly, in April 1949, when the preliminary sketch plan was prepared for the reefer and commissary building om Parry Island, a fourcompartment refrigerator of the type described above was incorporated in the building layout. The building was a standard 24 foot wide aluminum structure 100 feet long, with a partition located so as to divide the building into two roams, each approximately 50 feet long. One room contained the refrigeration units; the other was for dry storage, i. e., can- ned goods, paper goods, etc. In July 1949, while the working drawings for this facility were in preparation, a specificatiom was written for procurement of the main food storage refrigerator for Parry Island, This was for a four-compartment refrigerator of a type similar to that contemplated at the time the preliminary sketch plan had been prepared, As specified and furnished, the refrigerator was 42 feet, 6 inches long, 12 feet wide, and 8 feet, 6 inches high. overall outside dimensions, and was divided by partitions into four equal sized compartments, each having approximately 825 cubic feet gross intermal volume. The refrigerator was of portable, sectional design to facilitate transporting, handling, and erecting in the field, It was designed to be completely self-sustubieg, requiring only a level surface on which to lay the floor. Se popts showing the front of four conmpartment refrigerator as described. The sections or panels which formed the walls, floor, ceiling, and partitions consisted of frames of wolmanized Douglas fir, insulated with giass fibre, and completely sealed between sheets of 18—-gauge aluminum in such a manner as to insure that each section was absolutely airtight and watertight. For ease in handling, no section exceeded 48 inches in width, The joints between sections ware of tongue and groove design, and the sections were drawn together with lag bolts on resilient gaskets. The rear wall of each compartment was provided with an opening for the insertion of a demountable, plug-in type insulated panel furnished as a part of the refrigeration equipment assembly. See photo showing a view of the interior of a typical compartment ooking through the opening provided for the hetrigerationsmpar ment ot 5-264 en