Mae'r cwcis hyn yn gwbl angenrheidiol ar gyfer weithrediad y wefan.
Rydym yn defnyddio Google Analytics i fesur sut ydych yn defnyddio'r wefan er mwyn i ni ei wella yn seiliedig ar angen defnyddwyr.
Gall y cwcis hyn gael eu gosod gan wefannau trydydd parti a gwneud pethau fel mesur sut rydych yn gwylio fideos YouTube.
Amgueddfa Cymru
Worker measuring thickness of scrolled tinplate sheet at The Metal Box Company, Neath. Photographer's stamp on the back. The scroll shape was for the presses after it had been cut into strips with a scroll shears in the press department (Open Top). Workers would 'whip' a sheet out of the coil cut up line as it came from the shears to measure it as the photo shows.
