=The Lighting of the Rotunda.=--The soffits of the arches upholding the dome are ornamented with a row of plain coffers; the larger arches which roof the alcoves within, carry a triple row of more elaborate coffers, each with a gilt rosette. The windows of stained glass, already spoken of as enclosed by these arches, are semicircular in form and measure thirty-two feet across at the base. They furnish the greater part of the light needed for the illumination of the room. No shadows are cast in any direction. Being so high above the floor, the light from them is much more effective than if they were nearer the level of the reader’s eye. They are better even than skylights, and with none of the disadvantages of skylights. Other sources of light are the various little windows pierced in the four walls of the Octagon which face the interior courts; and, above, the eight windows of the Lantern. It has been said that no reading room in the world is so well lighted--so steadily, abundantly and uniformly, whether on the brightest or the darkest day. Mr. Blashfield’s paintings in the dome, for example, can hardly be said to receive direct light from a single window in the room, but for all that, so perfectly is the light diffused, they are as easily made out as any decorations in the building. In the evening, the light, which is furnished entirely by electric lamps, is quite as perfect in its way as in the daytime. In the second story of the arcading of the marble screens, a brass rod runs between the capitals of each arch, supporting in the centre a brass star of eight points, each point an electric lamp of thirty-two-candle power. With seven of these in each screen (except the west, where Mr. Flanagan’s clock leaves room for only four), and eight screens, one has a total of four hundred and twenty-four lamps thus used. Above the cornice of the second entablature is a great ring containing three hundred and eight more. Similarly, a line of fifty lamps occurs at the bottom of each of the semicircular windows, making four hundred in all; and in the eye of the lantern, so placed, however, that the lamps themselves are invisible, is a second ring numbering forty-six. On the floor, the reading desks are equipped, altogether, with sixty-eight bronze standards, each bearing three lamps, or two hundred and four in all. Add the number, seventy-six, which serve to light the Distributing Desk and the lower story of the alcoves, and the result is a grand total of fourteen hundred and fifty-eight, and a total candle-power of upwards of forty thousand. When the current is turned on and all these lamps are lit, the Rotunda presents a spectacle of light and shadow worth going far to see. [Illustration: SEALS OF WASHINGTON AND KANSAS.--BY H. T. SCHLADERMUNDT. WITH AUTHORIZED SEAL OF KANSAS IN THE CENTRE.]