able ▁in ▁science ▁and ▁mathematics , ▁but ▁a ▁close ▁ins pection ▁of ▁his ▁ess ay ▁and ▁curr icul um ▁revealed ▁that ▁the ▁extent ▁of ▁his ▁mathematical ▁teach ings ▁was ▁limited ▁to ▁algebra , ▁trig on ometry ▁and ▁log arith ms . ▁Thus , ▁Green ' s ▁later ▁mathematical ▁contributions , ▁which ▁exhib ited ▁knowledge ▁of ▁very ▁modern ▁develop ments ▁in ▁mathematics , ▁could ▁not ▁have ▁resulted ▁from ▁his ▁ten ure ▁at ▁the ▁Robert ▁Good acre ▁Academy . ▁He ▁stayed ▁for ▁only ▁four ▁terms ▁( one ▁school ▁year ), ▁and ▁it ▁was ▁spec ulated ▁by ▁his ▁contempor aries ▁that ▁he ▁probably ▁exha usted ▁all ▁they ▁had ▁to ▁teach ▁him . ▁ ▁Move ▁from ▁Not ting ham ▁to ▁S ne inton ▁ ▁In ▁ 1 7 7 3 ▁George ' s ▁father ▁moved ▁to ▁Not ting ham , ▁which ▁at ▁the ▁time ▁had ▁a ▁reputation ▁for ▁being ▁a ▁pleasant ▁town ▁with ▁open ▁spaces ▁and ▁wide ▁roads . ▁By ▁ 1 8 3 1 , ▁however , ▁the ▁population ▁had ▁increased ▁nearly ▁five ▁times , ▁in ▁part ▁due ▁to ▁the ▁bud ding ▁industrial ▁revolution , ▁and ▁the ▁city ▁became ▁known ▁as ▁one ▁of ▁the ▁worst ▁sl ums ▁in ▁England . ▁There ▁were ▁frequent ▁ri ots ▁by ▁star ving ▁workers , ▁often ▁associated ▁with ▁special ▁host ility ▁towards ▁b akers ▁and ▁mill ers ▁on ▁the ▁susp icion ▁that ▁they ▁were ▁hiding ▁gra in ▁to ▁drive ▁up ▁food ▁prices . ▁ ▁For ▁these ▁reasons , ▁in ▁ 1 8 0 7 , ▁George ▁Green ▁senior ▁bought ▁a ▁plot