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Single-dish submillimeter continuum observations showed that IRAS 4 in the NGC 1333 region of the L1450 molecular cloud is a 30Љ separation binary protostellar system. The components are designated as 4A and 4B, and are believed to be very young and deeply embedded. Our observations with the CSO-JCMT Interferometer at ϭ 0.84 mm show that components 4A and 4B are both multiple systems; the visibility curve for IRAS 4A is well fitted by a 1"8 binary whose components are consistent in size anddoi:10.1086/309713 fatcat:7zwjsgzylbe5daxmpsgsfcex2y