It consists of two glass
tubes approx. 220mm long x 8mm bore, one closed at the top and the other
tube open. The lowers ends of tubes are drawn out and connected together by
1.5m of rubber pressure tubing 10mm outside diameter x 5mm inside diameter.
Both the tubes are mounted on brackets which can be locked in any position
on metal supporting rods. Stand is made of approx. 1.06m in height and
carries a graduated scale 0 to 100 cm with mm divisions in center and
figured every 2 cm up either side on heavy metal box. Mercury required for
this apparatus is approx. 30 cm³. supplied without mercury.
