Relief shown by hachures and spot heights. Depths shown by soundings.
Also shows magnetic variation.
Insets: Hongkong -- Currents during the N.E. monsoon in the Indian Ocean, China and adjacent seas -- Streams, currents and drifts in the Pacific Ocean.
"Cor. (1888-52."--Sheet I.
"Cor. (1889-8."--Sheet II.
"Cor. 1888.33,40,43,44,45,50.)(89-5-6-8.11.16."--Sheet IV.