Every screen manufacturer has his own scheme for fastening the screen cloth firmly in both metal and wood frames. The idea is that the cloth must not sag in the frames, on the largest openings in doors or windows, porches, etc., that when either whacked by the children or inadvertently struck by adults, the cloth will remain taut and rigid and stay in place in the frame. The tubular metal frame in this connection seems the most logical metal frame. It is lighter and as strong as the other types of metal frames. It is so admirably contrived that the cloth can be removed without an extra tool and the springs and slides can be very conveniently and admirably fitted. The tracks or slide upon which the metal frame works must be a slide and not a series of sticking points. This means good workmanship. Another advantage the metal frame has over the wood frame is that it does not need the disfiguring hinges; if hinged, it can be hung on the pivot hinge which leaves no scar, and is inserted in the casing of window and leaves no trace. When it is to be taken down for the winter it is simply lifted out--no pins to come out of hinges and no unscrewing. VARIETIES OF METAL SCREENS The type of screen is of course dependent upon the kind of window or opening you have to screen. The usual types are: sliding and rolling, casement and stationery. The sliding screens are usually used on the double hung window and slide on a slide. The best slides are of metal backed by wood. A double hung window can be screened by a single screen or a double one, dependent on the wish of the purchaser. The double slide is necessary, of course, in the case of the double screen. In this connection it is interesting to note that there is a new type of window lately on the market that arranges in the head of the window a space into which not only the screen can disappear but the window itself, and be out of the way. This of course allows for a completely open window even more so than the casement. The pleasure of the slide screen is in the fact of its sliding and not catching in a series of struggles to make it work. Springs and tubular grooved frames complete this type. If the springs get out of order in a tubular grooved frame, they can easily be taken out and restored without special tools. They are protected also from wear and rust and made so as to withstand atmospheric ravages. A safety device should be provided to prevent the spring from accidentally disengaging itself. If the screen is hung inside the window, one hand lift is sufficient. If it is hung outside it is well to have another on the inside to be of service when removing them for winter storage. ROLLING SCREENS The acme of screen perfection is attained in the rolling screen. At present this type is creating the interest it deserves, as it is adapted to every kind of window and can be kept on the window throughout the year.