December 10, 2012
Neon moiré (with observing astronomer).
The frontispiece to The Story of the Sun, Moon, and Stars by Agnes Giberne (1908). Original from the New York Public Library. Digitized June 22, 2006.

Neon moiré (with observing astronomer).

The frontispiece to The Story of the Sun, Moon, and Stars by Agnes Giberne (1908). Original from the New York Public Library. Digitized June 22, 2006.

October 30, 2012

Plates left folded.

Throughout A Plain Method of Determining the Parallax of Venus by James Ferguson (1761). Original from Oxford University. Digitized March 25, 2009.

September 30, 2012
Plate left folded.
From p. 108 (?) of An Introduction to the True Astronomy: or, Astronomical Lectures, Read in the Astronomical School of the University of Oxford by John Keill (1739). Original from Ghent University. Digitized January 22, 2008.

Plate left folded.

From p. 108 (?) of An Introduction to the True Astronomy: or, Astronomical Lectures, Read in the Astronomical School of the University of Oxford by John Keill (1739). Original from Ghent University. Digitized January 22, 2008.

July 12, 2012
Bookplate placed over illustration. 
From the front matter of Astronomia Accurata: or, The Royal Astronomer and Navigator by Robert Heath (1760). Original from the University of Michigan. Digitized October 25, 2007.

Bookplate placed over illustration. 

From the front matter of Astronomia Accurata: or, The Royal Astronomer and Navigator by Robert Heath (1760). Original from the University of Michigan. Digitized October 25, 2007.

February 15, 2012

Diagrams left folded through digitization.

From various pages of A Plain Method of Determining the Parallax of Venus by James Ferguson (1761). 

February 15, 2012

Printed plates visible through the page? Transfer of ink from printed plates to facing pages? Plates traced by reader, through the page? 

From various pages of A Treatise of Eclipses of the Sun and Moon, for Thirty-Five Years by Charles Leadbetter (1731). 

August 18, 2011
Diagram left folded through digitization.
From Hand-book of Natural Philosophy and Astronomy by Dionysius Lardner (1853). [Here]

Diagram left folded through digitization.

From Hand-book of Natural Philosophy and Astronomy by Dionysius Lardner (1853). [Here]

August 18, 2011
Ink transfer from plate to opposite page.
From First Principles of Natural Philosophy by James Renwick (1842). [Here]

Ink transfer from plate to opposite page.

From First Principles of Natural Philosophy by James Renwick (1842). [Here]