Relief shown by gradient tints and hachures.; Each sheet includes inset maps and glossary of terms.; 1. Isogonic lines (declination) --2. Isoclinal lines (dip) -- 3. Isodynamic lines (total intensity); "Details see Vol. I, section VI of their "Results of a scientific mission to India and High Asia" 1861."; "Messrs. de Schlagintweits India and High Asia" -- top margin.Color;1:8,000,00
