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84 McINTOSH BATTERY AND OPTICAL CO., CHICAGO, ILL., U. S. A. foot rope and also one end of one of the 50 foot ropes; then carrying the other ends of both of these pieces of rope in your hands or tied round your waist, ascend your step-ladder and place another strong screw eye in the wall, rafter, or pillar, at the desired height; through this ring pass both ends of the ropes; descend your ladder and fasten the other end of the short piece to one of the rings in the corner of the screen; the end of the 100 foot rope you do not make fast at all, but carry or thread it, as we might say, through all of the rings on the top of the screen. Then having made fast one end of the remaining 50 foot rope to one of the corner rings, you ascend your step-ladder on the opposite side of the hall or room, and having placed your screw eye in the wall there, carry the ropes through and descend your ladder, place a screw eye in the floor or base board on that side of the room. You have now finished climbing, and yet your screen remains on the floor. Now, if you pull up tightly, taking up all of the slack in the 100 foot piece of rope, it will stretch across the auditorium like a wire; put on all the strength you have, and if necessary call some one to help you and make it fast. Now, by tightening the two short ropes on either side, you spread out the screen on the rope, and can slide it back and forth into any desired position; then having drawn the short ropes tightly, make them fast in the same screw eyes to which are attached the ends of the long rope. Now, all that is necessary is to make fast to the floor the lower corners of screen, having them either on a line with the other screw eyes, or if the stereopticon is in the gallery pointing down, carry the lower margin of screen slightly forward, so that all the corners of the screen are equi- distant from the lantern; on the other hand, should the lantern be on the floor and pointing a little above the level, carry the lower margin of the screen slightly backward, and fasten with small screw eyes in the floor. The point to be borne in mind, is that for perfect definition on the screen, the four corners must be equi-distant from the lantern. One strong feature about this method of raising the screen, is that the screw eyes, being of trifling value, can be left in the wall to be used at the next enter- tainment ; all you have to do is to loosen your ropes and you can pull them right out, and thus save the bother and trouble of climbing up again.