An exhibition of paintings in enamel colours on glass has been opened at No. 357, Strand, which is likely to prove attractive to the patrons of art as well as to the sight-seeing public. It consists of faithful copies of Harlow's _Kemble Family;_ Martin's _Belshazzar_, _Joshua_, and _Love among the Roses;_ Sir Joshua Reynolds's celebrated group of _Charity_, and a tasteful composition of a _Vase of Flowers with fruit_, &c. The whole are ably executed, and calculated to advance the art of painting on glass to its olden eminence. The copies from Martin are of the size of his prints, and are perhaps the most successful: that of _Joshua commanding the Sun to stand still_ is powerfully striking: the supernal light breaking from the dense panoply of clouds is admirably executed, and the minuteness of the architectural details and the fighting myriads is indescribable. In the Hall of _Belshazzar_, the perspective is ably preserved throughout, though the interest of the picture is not of that intense character that we recognise in _Joshua_. The painting of the Trial of Queen Katherine is of the size of Clint's masterly print: it required greater delicacy in copying than did either of its companion pictures, since it has few of the strong lights and vivid contrasts so requisite for complete success on glass. The costumes are well managed, as the red of Wolsey's robes, and the massy velvet dress of Katherine. Of this print, by the way, there are appended to the Catalogue a few particulars which may be new and pleasant to the reader. Thus:-- "The Picture is on mahogany panel, 1-1/2 inch in thickness, and in size, about 7 feet by 5 feet. It originated with Mr. T. Welsh, the meritorious professor of music, in whose possession the picture remains. This gentleman commissioned Harlow to paint for him a kit-cat size portrait of Mrs. Siddons, in the character of Queen Katherine in Shakspeare's Play of Henry VIII., introducing a few of the scenic accessories in the distance. For this portrait Harlow was to receive twenty-five guineas; but the idea of representing the whole scene occurred to the artist, who, with Mr. Welsh, prevailed upon most of the actors to sit for their portraits: in addition to these, are introduced portraits of the friends of both parties, including the artist himself. The sum ultimately paid by Mr. Welsh was one hundred guineas; and a like sum was paid by Mr. Cribb, for Harlow's permission to engrave the well-known print, to which we have already adverted. The panel upon which the picture is painted, is stated to have cost the artist 15_l_.