A flat board is provided, with two uprights, both of which, with the board, are grooved to hold a pane of glass in a perpendicular position. The drawing to be copied is secured to the board on the left of the glass, and the blank paper is fastened on the right. The artist now stands to the left, as represented in the illustration, and looks down upon the glass at a very oblique angle. The original drawing is reflected from the polished surface of the pane to his eve, and at the same time he sees the white paper through the transparent glass, so that the lines of the model appear transferred, but reversed, upon the paper. These are followed with a pencil, and the outline is made.