gen ▁gas ▁bl end . ▁ ▁History ▁ ▁In ▁ 1 6 9 1 , ▁an ▁article ▁in ▁the ▁London ▁Gazette ▁mentioned ▁John ▁Lo ft ing , ▁who ▁held ▁a ▁pat ent ▁for ▁a ▁fire ▁engine : ▁" The ▁said ▁pat ente e ▁has ▁also ▁project ed ▁a ▁very ▁useful ▁engine ▁for ▁starting ▁of ▁be er , ▁and ▁other ▁liqu ors ▁which ▁will ▁draw ▁from ▁ 2 0 ▁to ▁ 3 0 ▁bar rel s ▁an ▁hour , ▁which ▁are ▁completely ▁fixed ▁with ▁br ass ▁joint s ▁and ▁sc rew s ▁at ▁reasonable ▁rates ". ▁ ▁In ▁the ▁early ▁ 2 0 th ▁century , ▁dra ug ht ▁be er ▁started ▁to ▁be ▁served ▁from ▁press ur ised ▁containers . ▁Art ific ial ▁carbon ation ▁was ▁introduced ▁in ▁the ▁United ▁Kingdom ▁in ▁ 1 9 3 6 , ▁with ▁Wat ney ’ s ▁experimental ▁paste ur ised ▁be er ▁Red ▁Bar rel . ▁Though ▁this ▁method ▁of ▁serving ▁be er ▁did ▁not ▁take ▁hold ▁in ▁the ▁UK ▁until ▁the ▁late ▁ 1 9 5 0 s , ▁it ▁did ▁become ▁the ▁fav ored ▁method ▁in ▁the ▁rest ▁of ▁Europe , ▁where ▁it ▁is ▁known ▁by ▁such ▁terms ▁as ▁en ▁pr ession . ▁The ▁carbon ation ▁method ▁of ▁serving ▁be er ▁subsequently ▁spread ▁to ▁the ▁rest ▁of ▁the ▁world ; ▁by ▁the ▁early ▁ 1 9 7 0 s ▁the ▁term ▁" dra ug ht ▁be er " ▁almost ▁exclus ively ▁referred ▁to ▁be er ▁served ▁under ▁pressure ▁as ▁opposed ▁to ▁the ▁traditional ▁c