div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Density Hydrometer BS 718 M50SP 0775 to 0825 18395175 G H Zeal gml at 15 degC The calibration method used to determine the density of the hydrometer is based on the FW Cuckow src=https:reader033vdocumentsnetreader033viewer20220420025e6e513522daf0613924af1ahtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv