▁his ▁personal ▁impress ions ▁and ▁opinions . ▁He ▁convers ed ▁with ▁movie ▁stars , ▁society ▁women , ▁far mers , ▁and ▁fellow ▁writers ▁like ▁U pton ▁S inc la ir . ▁In ▁his ▁comment ary , ▁Sal ten ▁is ▁both ▁adm iring ▁and ▁critical . ▁For ▁instance , ▁he ▁ad ores ▁natural ▁monuments ▁like ▁the ▁Grand ▁C any on ▁and ▁Y os em ite ▁National ▁Park ▁but ▁also ▁de pl ores ▁the ▁waste ▁of ▁natural ▁resources , ▁def or est ation ▁that ▁has ▁caused ▁er os ion , ▁and ▁the ▁excess ▁of ▁autom ob iles . ▁O ften ▁his ▁tone ▁is ▁ir onic ▁when ▁he ▁describes ▁every day ▁phen omena ▁like ▁advert ising ▁or ▁large ▁movie ▁the aters ▁for ▁his ▁European ▁readers . ▁Sometimes ▁he ▁illustr ates ▁the ▁sc ener ies ▁by ▁comparing ▁them ▁to ▁those ▁of ▁Europe , ▁so ▁that ▁his ▁Aust rian ▁readers ▁could ▁grasp ▁them . ▁ ▁Even ▁earlier , ▁Sal ten ▁had ▁been ▁fasc in ated ▁with ▁technical ▁innov ations , ▁like ▁the ▁radio , ▁and ▁the ▁American ▁efficiency . ▁He ▁visited ▁Ford ’ s ▁factory ▁in ▁Detroit ▁and ▁a ▁sla ugh ter house ▁in ▁O ma ha ▁and ▁describes ▁the ▁mechanical ▁killing ▁of ▁animals ▁and ▁rec y cling ▁of ▁used ▁cars ▁which ▁proceed s ▁on ▁a ▁convey or ▁bel t , ▁feeling ▁both ▁fasc ination ▁and ▁ab hor rence . ▁ ▁When ▁it ▁comes ▁to ▁prohib ition ▁of ▁alco hol , ▁Sal ten ▁is ▁very ▁critical , ▁even ▁hor r ified ▁of ▁the ▁young ▁bo oz er ▁girls