Schmalcalder, Charles.—“A delineator, copier, proportionometer, for the use of taking, tracing, and cutting out profiles, as also copying and tracing reversely upon copper, brass, hard wood, cardpaper, paper, asses’ skin, ivory, and glass, to different proportions, directly from nature, landscapes, prospects, or any object standing or previously placed perpendicularly, as also pictures, drawings, prints, plans, caricatures, and public characters.” This apparatus is composed of (1) a hollow rod “screw’d together, and from two to twelve feet, or still longer, chiefly made of copper or brass, sometimes wood, or any metal applicable;” the diameter is from half an inch to two inches and upwards, according to the length; one end carries a fine steel tracer, made to slide out and in and fastened by a milled-head screw, and in the other is “a round hole to take up either a steel point, blacklead pencil, or any other metallic point, which may be fastened therein by a mill’d-head screw;” (2) a tube about ten inches long and sufficient in diameter to allow the rod “to slide easily and without shake in it;” (3) a ball (in which the tube is fixed) “moveable between two half sockets;” (4) a frame of wood about two and a half or three feet long (the length depending on the length of the rod) and supported by two brackets; (5) a swing-board attached to the frame; (6) a clamp-screw; (7) a hook hanging on a string for the rod to rest in; (8) a weight on the back of the frame, connected thereto by a hook, “to which is attached a string forming a pulley, serving to prevent the point from acting upon the paper when not wanted.” Through the sides of the frame are holes at certain distances corresponding with marks on the rod, and “in copying any original, supposing to the size of ⅛, ¼, ½, ¾, &c.,” the swing-board and clamp-screw “must be transplanted to the different holes and divisions corresponding.” The paper or other substance is fastened to the swing-board by screws or is placed in a brass frame which slides up and down the board, and is kept in position by a spring. “The machine is fixed either to a partition in any room or to any piece of wood portable, and so constructed as to be easily fixed upright with a screw-clamp upon a table or any other stand.” In turning the rod round in the sockets “the tracer and point in the two ends of the rod must remain in the centre, to obtain which sometimes an adjustment with four screws” is required. Directions are given for using the apparatus in taking profiles, in copying and tracing pictures, landscapes, &c., and in copying from nature “landscapes or whatever object exposes itself to view.” [Printed, 6d. Drawing. See “Repertory of Arts,” vol. 10 (second series), p. 241; “Rolls Chapel Reports,” 7th Report, p. 195.]