“…This work reports the location of hydrogen atoms in the structures of N-n-butyl-2,3-dimethyl-l,4-i ndo-(3',4'-pyrrolidino)-l,4-dihydronaphthalenehydrochloride, C20H27 N. HC1 (Argos & Clayton, 1973) and magnesium bis(nonahydrohexaborate)-bis(tetrahydrofuran), Mg(B6Hg)2. (C4HsO)2 (Denton, Clayton & Shore, 1974) by means of a weighted difference synthesis first described by Smith, Zingaro & Meyers (1971).…”