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Plates · 80 × 77

artwork-v2

Patent · Apparatus for the Covert Conveyance of Speech (fig. II)

The plate

artwork-v2, drawn on the grid.
Fig. 180 across, 77 down.
The grid itself

When

Has not led the front.

With

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WIBWOBWIKI 970 · PLATES 2026-09-05 · edition No. 3