Pioneer Oceanographic Chart of the North Pacific Ocean

Unknown (Buffon?).
Carte Des Declinaisons Et Inclinaisons
De L'aiguille Aimantee...
Engraved map.
Naturelle Histoire des Mineraux, 1780.
22 ¼" x 42 ½" sheet.
"redigee d'apres la table des observations magnetiques faite par les voyageurs depuis l'annee 1775" Handsome two-sheet scientific chart of magnetic observations made by all the major voyagers in the North Pacific up until 1775. Sharp impression on heavy laid paper. The dimensions here are larger than a set offered in England in 1986. All adjacent land masses shown from Cochinchine, Chine, Coree,and Japon to OONALASHKA, (much blank, uncharted coastline from Cap Edgecombe to Nootka), Cap Flattery, Californie (Baja), to Terre Ferme (Panama). Interior of N.Am. divided between Nouvau. Mexique, Mexique Louisiane, Floride, Etats-Unis (U.S.) and Canada. Cuba, Chesapeak, Long Island, and C. Cod also named. N(ew) Orleans is only city named in North America! Some marginal spotting, else very good example..