He was succeeded by Horsburgh, whose name is justly dear to navigators. We must now speak of two important expeditions, which ought to have settled the animated discussion as to the shape of the earth. The Academy of Sciences had despatched a mission to America, to compute the arc of the meridian at the Equator. It was composed of Godin, Bouguer, and La Condamine. It was decided to entrust a similar expedition to the North to Maupertuis. [Illustration: Pierre Louis Moreau de Maupertuis.] "If," said this scientific man, "the flatness of the earth be not greater then Huyghens supposed, the margin between the degrees of the meridian measured in France, and the first degrees of the meridian near the Equator, would not be too considerable to be attributed to possible errors of the observers, or to the imperfection of instruments. But, if the observation can be made at the Pole, the difference between the first degree of the meridian nearest the equatorial line, and, for example, the sixty-sixth degree, which crosses the polar circle, will be great enough, even by Huyghens' hypothesis, to show itself irresistibly, and beyond the possibility of miscalculation, because the difference would be repeated just as many times as there are intermediate degrees." The problem thus neatly propounded ought to have obtained a ready solution both at the Pole and the Equator--a solution which would have settled the discussion, by proving Huyghens and Newton to be right. The expedition embarked in a vessel equipped at Dunkerque. In addition to Maupertuis, it comprised De Clairaut, Camus, and Lemonnier, Academicians, Albey Outhier, canon of Bayeux, a secretary named Sommereux, a draughtsman, Herbelot, and the scientific Swedish astronomer, Celsius. When the King of Sweden received the members of the mission at Stockholm, he said to them, "I have been in many bloody battles, but I should prefer finding myself in the midst of the most sanguinary, rather than join your expedition." Certainly, it was not likely to prove a party of pleasure. The learned adventurers were to be tested by difficulties of every kind, by continued privation, by excessive cold. But what comparison can be made between their sufferings, and the agonies, the trials and the dangers which were to be encountered by the Arctic explorers, Ross, Parry, Hall, Payer, and many others. Damiron in his "Eulogy of Maupertuis," says, "The houses at Tornea, north of the Gulf of Bothnia, almost in the Arctic Circle, are hidden under the snow. When one goes out, the air seems to pierce the lungs, the increasing degrees of frost are proclaimed by the incessant crackling of the wood, of which most of the houses are built. From the solitude which reigns in the streets, one might fancy that the inhabitants of the town were dead. At every step one meets mutilated figures, people who have lost arms or legs from the terrible severity of the temperature. And yet, the travellers did not intend pausing at Tornea."