Theyrisebeforeme，thedeadandtheliving，inthemidstofthemostgratefulrecollections。Thefair，manlyfaceandstatelyfigureofmyfriend，Dr。SamuelParkman，himselffitforthehighestofficesofteaching，yetwillingtobemyfaithfulassistantinthetimeofneed，comebacktomewiththelongsighofregretforhisearlylosstoourearthlycompanionship。EveryyearIspeaktheeulogyofDr。
Ainsworth’spatienttoilasIshowhiselaboratepreparations：WhenI
takedownmy“AmericanCyclopaedia“andborrowinstructionfromthelearnedarticlesofDr。Kneeland，Iceasetoregretthathisindefatigableandintelligentindustrywasturnedintoabroaderchannel。AndwhatcanIsaytoocordialofmylongassociatedcompanionandfriend，Dr。Hodges，whoseadmirableskill，workingthroughtheswiftestandsurestfingersthateverheldascalpelamongus，hasdelightedclassafterclass，andfilledourMuseumwithmonumentswhichwillconveyhisnametounborngenerations？
Thisdaybelongs，however，nottomyselfandmyrecollections，buttoallofuswhoteachandallofyouwholisten，whetherexpertsinourspecialtiesoralienstotheirmysteries，ortimidneophytesjustenteringtheportalsofthehallofscience。Lookinwithme，then，whileIattempttothrowsomeraysintoitsinterior，whichshallilluminateafewofitspillarsandcornices，andshowatthesametimehowmanynichesandalcovesremainindarkness。
SCIENCEisthetopographyofignorance。Fromafewelevatedpointswetriangulatevastspaces，inclosinginfiniteunknowndetails。Wecastthelead，anddrawupalittlesandfromabysseswemayneverreachwithourdredges。