▁doub ts ▁ar ising ▁from ▁certain ▁Material ist ▁views , ▁which ▁are , ▁al as !, ▁too ▁common ▁among ▁medical ▁students ". ▁ ▁Ge ology ▁and ▁Origin ▁of ▁the ▁Species ▁Dar win ▁also ▁took ▁the ▁popular ▁natural ▁history ▁course ▁of ▁Professor ▁Robert ▁James on , ▁learning ▁about ▁strat ig raph ic ▁ge ology . ▁James on ▁was ▁a ▁Ne pt un ian ▁ge ologist ▁who ▁taught ▁that ▁str ata ▁had ▁precip itated ▁from ▁a ▁universal ▁ocean : ▁he ▁held ▁deb ates ▁with ▁chem istry ▁professor ▁Thomas ▁Charles ▁Hope ▁who ▁held ▁that ▁gran ites ▁had ▁cry st all ised ▁from ▁mol ten ▁cr ust , ▁ideas ▁influenced ▁by ▁the ▁Pl ut on ism ▁of ▁James ▁H utton ▁who ▁had ▁been ▁Hope ' s ▁friend . ▁James on ' s ▁view ▁was ▁that ▁" It ▁would ▁be ▁a ▁mis fort une ▁if ▁we ▁all ▁had ▁the ▁same ▁way ▁of ▁thinking ... ▁Dr ▁Hope ▁is ▁decided ly ▁opposed ▁to ▁me , ▁and ▁I ▁am ▁opposed ▁to ▁Dr ▁Hope , ▁and ▁between ▁us ▁we ▁make ▁the ▁subject ▁interesting ." ▁Dar win ▁liked ▁Hope ▁and ▁found ▁James on ▁a ▁b oring ▁speaker . ▁It ▁is ▁not ▁known ▁what ▁he ▁made ▁of ▁James on ' s ▁closing ▁lect ures ▁on ▁the ▁" Origin ▁of ▁the ▁Species ▁of ▁Anim als ". ▁Dar win ▁enjoyed ▁practical s ▁in ▁the ▁Museum ▁and ▁course ▁field ▁tri ps , ▁learning ▁the ▁sequence ▁of ▁str ata . ▁The ▁Museum ▁of ▁Edinburgh ▁University ▁was ▁James on ' s ▁preserve ▁and ▁was ▁then ▁one ▁of ▁the ▁largest