teeth being on dents who would hardly feel warranted in purchasing one of | are formed by cutting half from cach plate, a very simple | the center line of the windows. them, who would construct one but for a few difliculties| matter as compared with cutting the three holes froman| In front of the… … chine fully as efficient as the best in mar- edges of the apertured disk, A. The points APERTURED DISKS. of the combs cach cover a space 244 inches ket; and that, too, without any consider- able outlay for materials. Without de- long, or about equal to the width of the scribing in detail the…
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