1778 Copper Engraving Antique Sector Graham Astronomy Instruments Diderot DDR1 XGKC5 There is light bleed through

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This piece was illustrated by Schilder

both of which are difficult to see in the digital image

This is an original 1901 8-page article (4 double-sided pages) by Ludlow Brownell on the study of early earthquake seismic activity and its relative consequences

1778 Copper Engraving Antique Sector Graham Astronomy Instruments Diderot DDR1 XGKC5 There is light bleed through"Astronomie, Instrumens, Premier Secteur de M. Graham" This is an original 1778 black and white copper engraving with drawings of a sector invented by George Graham. CONDITION This 235+ year old Item is rated Very Fine ++. Light aging throughout. No creases. No natural defects. No tears. Light water stain top left corner. Please note: There is a plate impression bordering the image in this print. Product Type: Original Copper Engraving; Black White