Report on the tides at Tagal [Tegal], Indonesia, by F T E van Gorkum Summary report on tidal observations at Tegal, on the island of Java, Indonesia. Headed: 'Algemeen Rapport van de watergetijen waargenomen te Tagal gedurende den Jare 1839'. [General report on the tides observed at Tagal during the year 1839]. Concluding with: 'De Luitenant ter Zee 2d Klasse belast met de observatien der watergetijen te Tagal gedurende den jare 1839'. [The naval Lieutenant 2d Class charged with the observations of the water tides at Tagal during the year 1839]. 1840 [?]