U fiirso qoraalka hoose ka dibna ka jawaab su'aasha kadib isla luqadda qoraalka:  In tijaabo kale lagu sameeyo tijaabada waxaa soo jeediyay Royal Society 1772 Nevil Maskelyne, Astronomer Royal. Wuxuu soo jeediyay in tijaabadu ay "sharaf u tahay umadda halka lagu sameeyay" wuxuuna soo jeediyay Whernside ee Yorkshire, ama Blencathra-Skiddaw massif ee Cumberland inay yihiin bartilmaameedyo ku habboon. Jaaliyadda Royal waxay sameysay Guddiga soo jiidashada si ay u tixgeliyaan arrinta, iyagoo magacaabay Maskelyne, Joseph Banks iyo Benjamin Franklin xubnaheeda. Guddigu wuxuu u diray xiddig-yaqaanka iyo kormeeraha Charles Mason si uu u helo buur ku habboon. Kadib raadinta dheer ee xagaaga 1773, Mason wuxuu soo wariyay in musharraxa ugu fiican uu ahaa Schiehallion (markaasna loo qoray Schehallien), oo ah 1,083 m (3,553 ft) oo u dhexeeya Loch Tay iyo Loch Rannoch ee bartamaha Scottish Highlands. Buurta waxay ka go'day buuraha u dhow, taas oo yareyn doonta saameynta culeyska, iyo jilibkeeda isbarbar socda ee bariga-galbeed ayaa fududeyn doonta xisaabinta. Qaaxada waqooyi iyo koonfureed ee dhaadheer waxay u oggolaanaysaa tijaabada in lagu dhigo meel u dhow xarunta cufnaanteeda, iyadoo la kordhinayo saameynta leexashada. Si kadis ah, buurta dusheeda waxay ku taalaa meel u dhow bartamaha Scotland. Si kastaba ha ahaatee, Mason ayaa diiday inuu shaqadan fuliyo isaga oo u soo bandhigay hal guinea maalin kasta. Sidaa awgeed shaqadu waxay ku dhacday Maskelyne, taas oo loo ogolaaday fasax ku meel gaar ah oo ka mid ah waajibaadkiisa sida Astronomer Royal. Waxaa ka caawiyay xisaabyahanka Charles Hutton iyo Reuben Burrow, oo ah xisaabyahan ka tirsan Royal Greenwich Observatory. Shaqaale ayaa loo shaqaaleysiiyey inay dhisaan xarumo lagu kormeero xiddigiska, ayna ka caawiyaan sahaminta. Kooxda cilmiga sayniska ayaa si gaar ah u qalabeysan: qalabkeeda astronomical waxaa ka mid ahaa 12 in (30 cm) afargeesle naxaas ah oo ka yimid Cook 1769 transit of Venus expedition, 10 ft (3.0 m) qaybta zenith, iyo xakamaysada (saacad pendulum sax ah) waqtiga kormeerka astronomical. Waxay kaloo heleen theodolite iyo gunter silsilad si ay u kormeeraan...  Su'aal: Waa kuwee guddiga ay sameysay Royal Society oo ay ku jireen dad taariikhi ah sida Joseph Banks iyo Benjamin Franklin?
Guddiga soo jiidashada