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. 2016 Mar 1;11(3):e0150437. doi: 10.1371/journal.pone.0150437

Fig 2. comparison of residue appearance under V16 Zeiss zoom microscope with magnifications up to 180x (a & c) and reflected light metallurgical microscope (Zeiss AxioImager) with magnifications up to 500x: b &d) images from the same residues.

Fig 2

a & b) wood from retouching; c & d) antler from retouching (a: 160x; b, c, d: 100x).