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Figure 7
Series of scattering patterns of a porcupine quill section, recorded with the beam perpendicular to the quill axis (vertical), along the scan line represented in Fig. 6 . From left to right and then top to bottom, the positions starting from the outer face of the quill to the inner face correspond to the following depths in micrometres: 5, 15, 30, 60, 90, 120, 150, 185, 220, 225, 285, 320, 350, 380, 410, 440, 470, 500, 530 and 535. The intensity grey scale is logarithmic. |


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