. Smithsonian miscellaneous collections. mmmm, mm% wmmmm. Upper, slice, light micro-etch. X 4/5. One set of Neumann lines is appar-ent, RUNNING CROSSWISE OF THE SURFACE. IRREGULAR DARK BANDS, RUNNINGLENGTHWISE. Lower, the structure shown in upper figure, x 10. The nature of the BANDED APPEARANCE IS MORE APPARENT AND A SECOND SET OF FINER NEUMANNLINES CAN BE DISTINGUISHED. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 104, NO. 23, PL. 2

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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience