rin agar ▁Category : Build ings ▁and ▁structures ▁in ▁S rin agar ▁Category : B rid ges ▁over ▁the ▁J hel um ▁River ▁Category : B rid ges ▁in ▁Jam mu ▁and ▁K ash mir ▁Category : B rid ges ▁completed ▁in ▁the ▁ 2 0 th ▁century ▁Category : Con crete ▁brid ges ▁Category : Transport ▁in ▁S rin agar <0x0A> </s> ▁The ▁British ▁Institute ▁of ▁Rad i ology ▁( B IR ) ▁is ▁a ▁radi ology ▁society ▁and ▁char ity ▁ ▁based ▁in ▁London , ▁United ▁Kingdom . ▁It ▁is ▁the ▁oldest ▁inst itute ▁of ▁its ▁kind ▁in ▁the ▁world , ▁forming ▁on ▁ 2 ▁April ▁ 1 8 9 7 . ▁ ▁History ▁ ▁The ▁society ▁can ▁be ▁trac ed ▁back ▁to ▁two ▁separate ▁instit utes , ▁" The ▁X - R ay ▁Society " ▁in ▁April , ▁ 1 8 9 7 , ▁and ▁" The ▁Rö nt gen ▁Society "; ▁both ▁were ▁formed ▁in ▁the ▁w ake ▁of ▁the ▁discovery ▁of ▁x - ray s ▁by ▁Wilhelm ▁Rö nt gen ▁in ▁ 1 8 9 5 . ▁The ▁latter ▁was ▁founded ▁by ▁Dr ▁John ▁Mac int y re ▁in ▁ 1 8 9 7 . ▁He ▁had ▁been ▁the ▁first ▁person ▁in ▁Britain ▁to ▁use ▁x - ray s , ▁using ▁equipment ▁created ▁by ▁William ▁Thom son , ▁Lord ▁Kel vin ▁at ▁Glasgow ▁Royal ▁Inf irm ary ▁on ▁ 5 ▁February ▁ 1 8 9 6 . ▁ ▁The ▁formal isation ▁of ▁the ▁B IR ▁occurred ▁in ▁