e and only one experi- mental muffler had to be built. The construction of this is shown in figure 4. We adopted for this muffler the prismatic form for two reasons. In the first place; it is easier to construct than the circular form; and secondly, we believe that this form may have some… … Fig, 4. D. About half of the two expansion chambers are filled with closely packed wire gauze of decreasing mesh, in the following order going toward the outlets: Layers. Si Inches of 2 meshes per inch 28 2§ inches of 3 meshes per inch 26 2 inches of 4 meshes per inch 24 li inches of 5 meshes per…
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