Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: An sake maimaita gwajin Schiehallion a cikin 1856 ta Henry James, babban darektan Ordnance Survey, wanda a maimakon haka ya yi amfani da tudun Arthur's Seat a tsakiyar Edinburgh. Tare da albarkatun Ordnance Survey a hannunsa, James ya fadada bincikensa na topographical zuwa radius na kilomita 21, yana kai shi har zuwa iyakar Midlothian. Ya sami nauyin kimanin 5,300 kg·m-3. Wani gwaji a shekara ta 2005 ya yi bambancin aikin 1774: maimakon yin lissafin bambance-bambance na gida a cikin zenith, gwajin ya yi kwatankwacin kwatankwacin lokacin pendulum a saman da kasa na Schiehallion. Lokaci na pendulum aiki ne na g, saurin nauyi na gida. Ana sa ran pendulum zai tafi a hankali a tsawo, amma taro na dutsen zai yi aiki don rage wannan bambanci. Wannan gwajin yana da fa'idar zama mafi sauƙin gudanarwa fiye da na 1774, amma don cimma daidaito da ake so, ya zama dole a auna lokacin pendulum zuwa kashi ɗaya cikin miliyan. Wannan gwaji ya ba da darajar nauyin duniya na 8.1 ± 2.4 × 1024 kg, daidai da matsakaicin matsakaicin 7,500 ± 1,900 kg·m-3. Wani bincike na zamani na bayanan geophysical ya iya yin la'akari da abubuwan da ƙungiyar 1774 ba za ta iya ba. Tare da fa'idar samfurin tsawo na dijital mai nisan kilomita 120, ingantaccen ilimin ilimin geology na Schiehallion, kuma musamman kwamfuta, rahoton 2007 ya samar da matsakaicin ƙimar Duniya na 5,480 ± 250 kg·m-3. Idan aka kwatanta da adadi na zamani na 5,515 kg·m−3, ya tsaya a matsayin shaida ga daidaito na lura da ilimin taurari na Maskelyne.  Tambaya: wanda aka maimaita gwaji don duba yawa na duniya?
Henry James