▁of ▁objects ▁in ▁the ▁collection , ▁dam ages ▁which ▁were ▁a ▁result ▁of ▁their ▁being ▁stored ▁in ▁the ▁London ▁Under ground ▁t unn els ▁during ▁the ▁First ▁World ▁War . ▁The ▁creation ▁of ▁this ▁department ▁moved ▁the ▁focus ▁for ▁the ▁development ▁of ▁conservation ▁theory ▁and ▁practice ▁from ▁Germany ▁to ▁Britain , ▁and ▁made ▁the ▁latter ▁a ▁prime ▁force ▁in ▁this ▁fled g ling ▁field . ▁In ▁ 1 9 5 6 ▁Pl ender le ith ▁wrote ▁a ▁significant ▁hand book ▁called ▁The ▁Conserv ation ▁of ▁Anti qu ities ▁and ▁Works ▁of ▁Art , ▁which ▁supp l anted ▁R ath gen ' s ▁earlier ▁t ome ▁and ▁set ▁new ▁standards ▁for ▁the ▁development ▁of ▁art ▁and ▁conservation ▁science . ▁ ▁In ▁the ▁United ▁States , ▁the ▁development ▁of ▁conservation ▁of ▁cultural ▁her itage ▁can ▁be ▁trac ed ▁to ▁the ▁F og g ▁Art ▁Museum , ▁and ▁Edward ▁Wal do ▁For bes , ▁its ▁director ▁from ▁ 1 9 0 9 ▁to ▁ 1 9 4 4 . ▁He ▁encourag ed ▁technical ▁investigation , ▁and ▁was ▁Chair man ▁of ▁the ▁Ad vis ory ▁Committee ▁for ▁the ▁first ▁technical ▁journal , ▁Techn ical ▁Studies ▁in ▁the ▁Field ▁of ▁the ▁Fine ▁Arts , ▁published ▁by ▁the ▁F og g ▁from ▁ 1 9 3 2 ▁to ▁ 1 9 4 2 . ▁Import antly ▁he ▁also ▁brought ▁onto ▁the ▁museum ▁staff ▁chem ists . ▁R uther ford ▁John ▁G ett ens ▁was ▁the ▁first ▁of ▁such ▁in ▁the ▁US ▁to ▁be ▁perman ently ▁employed ▁by ▁an ▁art