Three public notices of patents granted by Royal decree. Each is with blue paper cover sheet, disbound from a large volume. Printed at the Great Seal Patent Office, 25 Southampton Buildings, Holborn and printed by George E. Eyre and William Spottiswoode. A collection of rarely seen patents that describe the intense work by inventors to make incremental improvements in the map making process.

A) A.D. 1852 - No. 13,932. Specification of Joseph Vincent Melchior Raymondi. Statistic and Descriptive Maps., 1857. New type of tables for publishing data.
B) A.D. 1852 - No. 907. Specification of Jean David Schneiter. Maps and Charts., 1854. Method of producing relief maps.
C) A.D. 1853 - No. 1066. Specification of Ambroise Maurice Christophe Claude Faure., 1853. Method of producing relief maps.

References:

Condition: B

Covers slightly soiled, and top blank margin of text block also soiled. Fold-out table of A) has several short fold separations and one long separation that extends almost the entire length of sheet.