A much needed addition to the technical literature of the Theatre is a comprehensive, authoritative, and just account of the origin and development of modern stage mechanism and of the art of stage lighting. The pioneer achievements of Edwin Booth, at Booth’s Theatre (opened, February, 1869), and of James Steele Mackaye and Augustin Daly are, as a rule, blandly ignored in writing on those subjects, and the movement for “Stage Reform” which began in Austria in 1879-’80 is taken as the starting-point. If ever such an account is written, laborious experiments and fine achievements by David Belasco, especially in the latter field, will, of necessity, occupy a conspicuous place in it. His active practical interest in the problems of stage lighting began as early as 1876 and it has not abated. The first attempt in America to use electric light for stage illumination,--at least, the first attempt of which I have found a record,--was made at the California Theatre, San Francisco, February 21 to 28, 1879. Belasco was there at that time and carefully observed the experiment, which was not notably successful.[3] From 1879 to 1902 he closely studied all methods of lighting and experimented much: since 1902, when he opened his first theatre and obtained satisfactory facilities for the work, his experimentation in that field has been incessant. The lighting system at the Stuyvesant Theatre was designed by Belasco in collaboration with his chief electrician, Mr. Louis Hartman, and was installed under their supervision. When that theatre was opened, the lamps of the footlights on the stage, and also those in each of the overhead “border light strips,” were arranged in seven sections, each section connected upon separate resistance, in order that any desired part of the stage or any figure or group of figures might be illumined or shadowed as desired. There were five sets of the border lights, with 270 lamps in each; there were eighty-eight connection pockets in the fly galleries and upon the stage through which large or small “bunch lights” could be connected as required; the switchboard (one of the largest, if not the largest, then in use in an American theatre) was equipped with seventy-five dimmers, in order that the lights should be under perfect control. Since the opening, in 1907, the lighting system has repeatedly been altered and improved. The most radical change is one made about two years ago [1917], whereby footlights are entirely dispensed with. The objection to footlights is, of course, an upward thrown shadow: this, however, can be satisfactorily dealt with, and, in my judgment, it is seldom if ever advantageous wholly to discard them. Belasco, however, thinks otherwise: his productions are the only ones made without footlights, which I have seen, in which the absence of those lights is adequately compensated. In his present theatre there is a contrivance, placed in the front of the