▁ 1 7 8 8 , ▁Mc Gr ig or ▁was ▁able ▁to ▁ble ach ▁ 1 5 0 0 ▁yards ▁of ▁cloth ▁to ▁his ▁satisfaction . ▁About ▁this ▁time ▁Ber th ol let ▁discovered ▁the ▁salt ▁and ▁sul ph ur ic ▁acid ▁process , ▁and ▁published ▁it ▁so ▁it ▁became ▁public ▁knowledge . ▁Many ▁others ▁began ▁to ▁experiment ▁with ▁impro ving ▁the ▁process , ▁which ▁still ▁had ▁many ▁short com ings , ▁not ▁the ▁least ▁of ▁which ▁was ▁the ▁problem ▁of ▁transport ing ▁the ▁liquid ▁product . ▁W att ' s ▁riv als ▁soon ▁over to ok ▁him ▁in ▁developing ▁the ▁process , ▁and ▁he ▁dropped ▁out ▁of ▁the ▁race . ▁It ▁was ▁not ▁until ▁ 1 7 9 9 , ▁when ▁Charles ▁T enn ant ▁pat ented ▁a ▁process ▁for ▁producing ▁solid ▁ble aching ▁pow der ▁( cal ci um ▁hy po ch lor ite ) ▁that ▁it ▁became ▁a ▁commercial ▁success . ▁ ▁By ▁ 1 7 9 4 ▁W att ▁had ▁been ▁chosen ▁by ▁Thomas ▁Bed does ▁to ▁manufact ure ▁appar atus ▁to ▁produce , ▁clean ▁and ▁store ▁g ases ▁for ▁use ▁in ▁the ▁new ▁P neum atic ▁Institution ▁at ▁Hot well s ▁in ▁Br istol . ▁W att ▁continued ▁to ▁experiment ▁with ▁various ▁g ases ▁for ▁several ▁years , ▁but ▁by ▁ 1 7 9 7 ▁the ▁medical ▁uses ▁for ▁the ▁" fact it ious ▁air s " ▁had ▁come ▁to ▁a ▁dead ▁end . ▁ ▁Person ality ▁W att ▁combined ▁theoretical ▁knowledge ▁of ▁science ▁with ▁the ▁ability