ed ▁by ▁John ▁Cass id y ▁who ▁also ▁executed ▁the ▁alleg or ical ▁group ▁of ▁' The ology , ▁Science ▁and ▁Art ' ▁in ▁the ▁vest ib ule . ▁ ▁As ide ▁from ▁the ▁main ▁library ▁and ▁reading ▁room ▁with ▁gallery ▁above , ▁the ▁design ▁incorpor ated ▁Bible ▁and ▁map ▁rooms ▁on ▁the ▁first ▁floor , ▁and ▁conference ▁( lect ure ) ▁and ▁committee ▁rooms ▁on ▁the ▁ground ▁floor , ▁part ▁of ▁which ▁was ▁intended ▁to ▁be ▁a ▁l ending ▁library ▁but ▁never ▁operated ▁as ▁such . ▁A ▁care t aker ' s ▁house ▁was ▁incorpor ated ▁in ▁the ▁building ▁until ▁it ▁was ▁demol ished ▁for ▁the ▁extension ▁of ▁ 1 9 6 9 . ▁ ▁Technology ▁Electric ▁light ing ▁was ▁chosen ▁as ▁the ▁clean est ▁and ▁saf est ▁alternative ▁to ▁gas ▁but , ▁as ▁the ▁use ▁of ▁electric ity ▁was ▁in ▁its ▁early ▁stages , ▁the ▁supply ▁( 1 1 0 ▁vol ts ▁DC ) ▁was ▁generated ▁on - site . ▁This ▁took ▁some ▁years ▁to ▁achieve ▁due ▁to ▁the ▁in ex per ience ▁of ▁contract ors , ▁but ▁the ▁library ▁became ▁one ▁of ▁the ▁first ▁public ▁buildings ▁in ▁Manchester ▁to ▁be ▁lit ▁by ▁electric ity ▁ ▁and ▁continued ▁to ▁generate ▁its ▁own ▁supply ▁until ▁ 1 9 5 0 . ▁ ▁Champ ne ys ▁suggested ▁that , ▁in ▁order ▁to ▁protect ▁the ▁books ▁and ▁manuscript s , ▁' it ▁will ▁be ▁very ▁des irable ▁to ▁keep ▁the ▁air ▁in ▁the ▁interior ▁of ▁the ▁building ▁as ▁clear ▁and ▁free ▁from ▁smoke ▁and