[ 19011 Hathaway and UTtderhill. 592. The Infrared h'pectra of Some Transition-rnetal Perchlorates. By R. J. HATHAWAY and A. E. UNDERHILL. The infrared spectra of some hydrated transition-metal perchlorates some transition-metal perchlorate-methyl cyanide complexes and anhydrous copper perchlorate are reported. Th