To the early part of Queen Victoria’s reign must be referred some of the most practical applications of the gigantic telescope erected by the Earl of Rosse at Parsonstown, in Ireland. This wonderful instrument (which, however, has been much surpassed by later telescopes) was in active operation from 1828 to 1845. Its power was such as to exhibit the very rocks on this side of the moon, and our knowledge of that satellite--a barren, mournful sphere of extinguished vitality--was greatly increased by the scientific labours of Lord Rosse and his coadjutors. Returning to mundane matters, we must refer to the opening of the Thames Tunnel, which took place on the 25th of March, 1843. The shaft had been commenced, and the first brick laid, as far back as the 2nd of March, 1825; but the work was twice delayed by the irruption of water. This subway between Wapping and Rotherhithe was undoubtedly a splendid triumph of modern engineering, and reflected the highest credit on Mr. I. K. Brunel, who proposed and carried out the design. But the tunnel was not long popular, and, after the dissolution of the Company in 1866, the work was transferred to the East London Railway, by which it has since been used. The Queen and Prince Albert were much interested in the tunnel, and, in July, 1843, honoured it with a visit of inspection. Arctic discovery made some important strides about this date. Sir John Franklin, accompanied by Captains Crozier and Fitzjames, sailed in the _Erebus_ and _Terror_ on his third Arctic Expedition, May 24th, 1845. From subsequent investigations, it appears that he discovered the North-west passage, having sailed down Peel and Victoria Straits (now called Franklin’s Straits) a few months after his arrival in those inhospitable regions. The Expedition, however, was fatal to the brave explorers. All England waited with anxiety for tidings of these adventurous men; but, after a few despatches, an appalling silence and mystery descended on the enterprise. Months passed away, and nothing more was heard of the _Erebus_ and _Terror_. It was as if ships and men had been snatched away from the world; and the public could comfort itself only with vague hopes that, after all, the vessels and their crew would reappear at some unexpected corner of the earth. When the suspense became no longer bearable, expeditions were sent out in search of the missing voyagers, and coals, provisions, clothing, and other necessaries, were deposited at various points by the English and American Governments, by Lady Franklin, and by several private individuals. Some years later, wild rumours started up that Sir John Franklin and the gaunt remnant of his crew had been seen at this place and at that; but these accounts always proved incorrect. It is unnecessary to recount the numerous expeditions sent out by Lady Franklin, and by the Governments of Great Britain and the United States. Suffice it to say that, on the 6th of May, 1859, Lieutenant Hobson found