He had however made an arithmetical error: his measurements actually led to a value of 5,448 kg·m−3; a discrepancy that was not found until 1821 by Francis Baily.
但是他算錯了：他的測量數據實際上指向 5,448 kg·m−3這個值；直到1821年，才由弗朗西斯·貝利找到這個錯誤。