Our new type Transversal Planigraphic Apparatus is herein introduced with the detail description on its construction, operation, arrangement, depth of section, erasing length and miscellaneous unsharpness of radiograph talen by this apparatus, comparing with the function of normal planigraphic apparatus ever existed. The result of my investigation on these functions indicated that the projected images on the horizonatal plane on the locus of the erasing images on the film are circles, ellipses, parabolas, hyperbolas and strainght lines according to the increase of the inclination of the film plane from 0 to π/2. Therefore, the erasing images in inclined pane of the film are the approximate conical sections, and the velocities of these spots are changed by the rotaton of the axis. So the depth of section is changed by the inclination of the film plane. And lasty the features of our new type Transversal Planigraphic Apparatus are described in detail.
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