ONE:In the galaxy of illustrious names that shed light upon this age, not the least conspicuous is that of Mary Somerville, who is known in British[431] science not only as the able commentator of Laplace's "Mcanique Cleste," but as the author of some ingenious experiments on the magnetising power of the violet ray, and on the permeability of different bodies to the chemical rays, similar to those of Melloni on the heating rays; and she found great and seemingly capricious variations in this respect. The beautiful invention of the stereoscope, one of the most interesting contributions made to the theory of vision, was the work of Mr. Wheatstone, who published an account of it in the "Philosophical Transactions" of 1838. In connection with experiments of this class should be mentioned the invention of the daguerreotype, or the production of permanent pictures on plated copper, in 1825, which was brought to perfection in 1839 by Daguerre, whose name it bears. About the same time Henry Fox Talbot applied himself to similar experiments, and invented the calotype, or the production of permanent pictures on paper; and by a subsequent invention he obtained what he justly called "an instantaneous process." The science of photography was, however, in its infancy.This coalition was considered a matter of great importance, not as giving strength to the Administration of Lord Liverpool, to which it brought only a few votes in the House of Commons, but as indicating a radical change of policy towards Ireland. Lord Eldon was by no means satisfied with the changes. "This coalition," he writes, "I think, will have consequences very different from those expected by the members of administration who have brought it about. I hate coalitions." No doubt they ill suited his uncompromising spirit; and any connection with Liberal opinions must have been in the highest degree repugnant to the feelings of one who believed that the granting of Catholic Emancipation would involve the ruin of the Constitution.
