▁at ▁the ▁same ▁time ▁that ▁Florence ▁Night ing ale ▁was ▁beginning ▁a ▁similar ▁program ▁in ▁British ▁military ▁hosp it als . ▁ ▁Se ut in ▁had ▁travel led ▁through ▁Russia ▁demonstr ating ▁his ▁' st arch ed ▁band age ', ▁and ▁his ▁technique ▁had ▁been ▁adopted ▁by ▁both ▁the ▁Russian ▁army ▁and ▁n avy ▁by ▁ 1 8 3 7 . ▁P iro gov ▁had ▁observed ▁the ▁use ▁of ▁pl aster ▁of ▁Paris ▁band ages ▁in ▁the ▁studio ▁of ▁a ▁sculpt or ▁who ▁used ▁stri ps ▁of ▁lin en ▁so aked ▁in ▁liquid ▁pl aster ▁of ▁Paris ▁for ▁making ▁models ▁( this ▁technique , ▁called ▁" mod roc ," ▁is ▁still ▁popular ). ▁P iro gov ▁went ▁on ▁to ▁develop ▁his ▁own ▁methods , ▁although ▁he ▁was ▁aware ▁of ▁Math ij sen ' s ▁work . ▁P iro gov ' s ▁method ▁involved ▁so aking ▁co arse ▁cloth ▁in ▁a ▁pl aster ▁of ▁Paris ▁mixture ▁immediately ▁before ▁application ▁to ▁the ▁lim bs , ▁which ▁were ▁protected ▁either ▁by ▁stock ings ▁or ▁cot ton ▁p ads . ▁Lar ge ▁dress ings ▁were ▁rein for ced ▁with ▁pieces ▁of ▁wood . ▁ ▁As ▁time ▁passed ▁and ▁the ▁method ▁moved ▁more ▁into ▁the ▁main stream ▁some ▁disag re ement ▁arose ▁as ▁to ▁the ▁problems ▁associated ▁with ▁cutting ▁off ▁air ▁to ▁skin ▁contact , ▁and ▁also ▁some ▁improvements ▁were ▁made . ▁Event ually ▁P iro gov ' s ▁method ▁gave ▁way ▁to ▁Math ij sen ' s . ▁Among ▁the ▁improvements ▁suggested ▁as ▁early ▁as ▁ 1