Main line detections of the spectra extracted for the three positions of NGC 1333: IRAS 4A, IRAS 4B, and IRAS 4C covering the full JCMT range 330−373 GHz. The gap seen at 368−369.5 GHz is due to poor atmospheric transmission. The spectra are plotted with a vertical offset at 0.3, 0.7 and 1.1 intensity levels (K) to facilitate comparison. The coordinates of the three sources IRAS 4A (RA = 03:29:10.51, Dec = 31:13:31.4 (J2000)), IRAS 4B (RA = 03:29:12.01, Dec = 31:13:08.0 (J2000)) and IRAS 4C (RA = 03:29:13.64, Dec = 31:13:57.5 (J2000)) are taken from Sandell & Knee (2001).