CHENISTRY AND INDUS'l'RY
cntiilysts ~ttny i i o \ ~ he rcciprociitctl by f ~t i d i i t ~i ~~~t i i l science in tltc I)rcsctitnt,iott ol ii ncir tool for tlie csniniiiiitioii of Iiytlrogcnntitig cntiilysts. TIte important t.lteorcticnl prcdict,ion of two forins of hydrogmi, o ~/ / / o - niid pnru-ltydrogcii, so 1)rillin tttly vcrificd cspcri~nc~~ti~lly hy l%onliocffcr itnil ll'urtcck two yc:irs ago, is tlic origin of bite new proposal. Rccctit work by A. Slicriiinti cuid t.he writer in the Princeton 1itI)oratory indicnt.cs tlint tlic orlho-3,ccrii-ItycIrogcn coiivcrsioti is i i convctiicnt tool for thc cvnIu:it.ioii of ititlust rial catalysts. Slieritiiiti lins sltorrii thnt,, with i ~-wry nctivc nickel, pw-hydrogen iuiiy be procluccrl tit liquid air tcnipcriit urcs, wlicrens previously only cltiircoul wiis kno\vn to nct in this capacity. Tltc con.crsioit lins hccii itssocicitctl with tlic prcsciice iit tlic nct ivc liiclicl surfiicc of activatctl iitlsorbcd Iipdrogcn. \'it11 poorer nickcl prq:irnt,ions no convcrsion is sccurcd. This ciipncity to clicct the orll~o-~nrcc-hytlrogcii couvrrsion ltns nlso been iisctl to confirm tlte diitn iilrendy prcscntctl on the ositlc catiilysts. 13eloir 0' C., wlicrc only moleculiir ;idsorpt.ion of hydro-