the metropole was set up with three old-fashioned barber 's chairs , behind which were a mirrored wall and the cabinets that contained the various implements of the trade : scissors , straight razors , shaving cream machines , tall glass jars of a blue liquid disinfectant , neatly folded towels , combs , brushes , electric hair clippers , canisters of talcum powder , and bottles of bracing aftershave .