Waxaa la filayaa in Henry James, agaasimaha guud ee Ordnance Survey, uu isticmaalo kursiga Arthur ee bartamaha Edinburgh. Iyada oo ilaha Ordnance Survey ee uu haysto, James wuxuu ballaariyay sahankiisa juqraafiyeed ilaa 21-kilomitir radius, isaga oo u kaxeynaya xuduudaha Midlothian. Wuxuu helay cufnaanta qiyaastii 5,300 kg·m−3. Tijaabo la sameeyay 2005 wuxuu sameeyay kala duwanaansho shaqo 1774 ah: halkii lagu xisaabin lahaa kala duwanaanshaha maxalliga ah ee zenith, tijaabada ayaa sameysay isbarbardhig aad u sax ah oo ku saabsan muddada pendulum ee dusha sare iyo hoose ee Schiehallion.
Henry James