Recording tide gauge by John English, 1850, from Lowestoft Harbour Recording tide gauge by John English, 1850 1850
Louis Fave's maregraphe; open-sea recording tide gauge by Jules Richard, 1925-1930 Louis Fave's maregraphe; open-sea recording tide gauge by Jules Richard 1925-1930
Portable recording tide gauge by A. Lege & Co. Ltd., c. 1887. Portable recording tide gauge by A. Lege & Co. Ltd. 1887