Determining location of objects across bodies of water. In:
Geometriae practicae novae et auctae tractatus I[-IV] ... By Daniel Schwenter,
1585-1636. Published posthumously in 1641. Book 3, page 12.
Call Number TA544 .S38 1641
Image ID: libr0032, Treasures of the NOAA Library Collection Photographer: Archival Photograph by Mr. Sean Linehan, NOS, NGS