materials" in which the scientific world has been too strangely suffered to lie, in this the world's most mechanical age; so that what ought to be questions of strict calculation are subjected to the guessings of a mere common sense, far from adequate, in many cases, to their proper resolution. "I once raised a vessel," said Mr. Bremner,--"a large collier, chock-full of coal,--which an English projector had actually engaged to raise with huge bags of India rubber, inflated with air. But the bags, of course taxed far beyond their strength, collapsed or burst; and so, when I succeeded in bringing the vessel up, through the employment of more adequate means, I got not only ship and cargo, but also a great deal of good India rubber to boot." Only a few months after I enjoyed the pleasure of this interview with the Brindley of Scotland, he was called south, to the achievement of his greatest feat in at least one special department,--a feat generally recognized and appreciated as the most herculean of its kind ever performed,--the raising and warping off of the Great Britain steamer from her perilous bed in the sand of an exposed bay on the coast of Ireland. I was conscious of a feeling of sadness as, in parting with Mr. Bremner, I reflected, that a man so singularly gifted should have been suffered to reach a period of life very considerably advanced, in employments little suited to exert his extraordinary faculties, and which persons of the ordinary type could have performed as well. Napoleon,--himself possessed of great genius,--could have estimated more adequately than our British rulers the value of such a man. Had Mr. Bremner been born a Frenchman, he would not now be the mere agent of a steam company, in a third-rate seaport town.