Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Hygrometer
Storrow's whirling hygrometer. In leather carrying case.
This whirling hygrometer is a contemporary type of hygrometer (viz. a ventilated type) much used for mine ventilation work. It is whirled by hand so that the bulbs move through the air at a velocity of 600 feet per minute.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.