1863
Plate II: Observatory signals : used at
Survey Book
Plate II: Observatory signals : used at
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1863
Plate III: Elevation of the Scaffold use
Survey Book
Plate III: Elevation of the Scaffold use
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1863
Plate IV: Plan and elevation of the plat
Survey Book
Plate IV: Plan and elevation of the plat
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1863
Plate V: Elevation of the scaffold used
Survey Book
Plate V: Elevation of the scaffold used
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1863
Plate VI: Elevation of the French scaffo
Survey Book
Plate VI: Elevation of the French scaffo
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1863
Plate VII: Elevation of the French scaff
Survey Book
Plate VII: Elevation of the French scaff
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