Jolly Bulb with Gauge Gifts designed to pair with a

designed to pair with a pump plate for atmospheric-pressure force demonstrations

Aluminum-cased plotting compass with a glass face and a dial marked with principal points

mitochondrion

place value

Jolly Bulb with Gauge Gifts designed to pair with a60 mm dia. Bulb connected to a bourdon guage. Gauge is calibrated in kg cm2 and in psi. Jolly bulb is 60mm diameter and is directly connected to a bourdon gauge. Use for investigation of gas at constant volume By inserting the glass bulb into either warm or cold water the expansion and contraction to the air contained in the bulb can be seen as a pressure change on the gauge. Gauge is calibrated in kg cm2 and in psi.