▁became ▁known ▁as ▁Jane ▁Green ▁and ▁the ▁couple ▁had ▁seven ▁children ▁together ; ▁all ▁but ▁the ▁first ▁had ▁Green ▁as ▁a ▁bapt ism al ▁name . ▁The ▁young est ▁child ▁was ▁born ▁ 1 3 ▁months ▁before ▁Green ' s ▁death . ▁Green ▁provided ▁for ▁his ▁common - law ▁wife ▁and ▁children ▁in ▁his ▁will . ▁ ▁Not ting ham ▁Sub scription ▁Library ▁ ▁When ▁Green ▁was ▁thirty , ▁he ▁became ▁a ▁member ▁of ▁the ▁Not ting ham ▁Sub scription ▁Library . ▁This ▁library ▁exists ▁today , ▁and ▁was ▁likely ▁one ▁of ▁the ▁only ▁sources ▁of ▁Green ' s ▁advanced ▁mathematical ▁knowledge . ▁Un like ▁more ▁conventional ▁libraries , ▁the ▁subscription ▁library ▁was ▁exclusive ▁to ▁a ▁hundred ▁or ▁so ▁subscri bers , ▁and ▁the ▁first ▁on ▁the ▁list ▁of ▁subscri bers ▁was ▁the ▁Duke ▁of ▁New castle . ▁This ▁library ▁c ater ed ▁to ▁requests ▁for ▁special ised ▁books ▁and ▁journ als ▁that ▁satisfied ▁the ▁particular ▁interests ▁of ▁their ▁subscri bers . ▁▁ 1 8 2 8 ▁ess ay ▁▁ ▁In ▁ 1 8 2 8 , ▁Green ▁published ▁An ▁Ess ay ▁on ▁the ▁Application ▁of ▁Mathemat ical ▁Analysis ▁to ▁the ▁The ories ▁of ▁Electric ity ▁and ▁Mag net ism , ▁which ▁is ▁the ▁ess ay ▁he ▁is ▁most ▁famous ▁for ▁today . ▁It ▁was ▁published ▁priv ately ▁at ▁the ▁author ' s ▁exp ense , ▁because ▁he ▁thought ▁it ▁would ▁be ▁pres um pt uous ▁for ▁a ▁person ▁like ▁himself , ▁with ▁no ▁formal ▁education ▁in ▁mathematics , ▁to ▁submit ▁the ▁paper