Plant Physiology
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Plant Physiology
Potometer, Simple
A glass tube with stopper at both ends. The bottom stopper has a mm graduated capillary tube while the top has two holes one for a glass tube to accommodate plant shoot through a rubber tube and the other for a 2 ml syringe to adjust air bubble during the setting up.
B13330 -
Plant Physiology
Potometer and Atmometer
For investigating transpiration. Measures the uptake of water by a cut plant shoot. The cut shoot may be replaced by a porous pot filled with water which enables measurement of the rate of evaporation from a moist surface, thus giving indication of relative humidity. Comprises a capillary tube with mm scale connected to a syringe and an outlet via a three-way stopcock. The syringe enables adjustment of air bubble during set-up, the outlet is connected to the cut shoot or porous pot, mounted on strong vertical plate.
B13335 -
Plant Physiology
Potometer, Ganong’s
To demonstrate rates of transpiration and of water absorption by a cut shoot, with a graduated capillary tube bent down at right angle at one end with a small orifice and having water reservoir with glass stopcock and the end tube with rubber stopper for the plant shoot at the other end, on base.
B13337 -
Plant Physiology
Potometer, Thoday
A glass tube 15 mm dia with a side arm leading to a thistle funnel in rubber tubing has both its ends tapered and bent at right angles. One end would accept plant stem and the other is connected to a capillarity tube with mm scale, mounted on an L shaped stand.
B13347 -
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Plant Physiology
Microburette
For measuring and sampling gas given off by aquatic plants e.g. Elodea. Comprises a bulb tube graduated 0 to 150 mm into which the cut end of the shoot is inserted. A 5 ml syringe is provided at top to draw gas collected in the burette for analysis. Overall height 300 mm.
B13355 -
Plant Physiology
Respirometer, Ganong’s
To measure gas evolved or absorbed by living materials or tissue extracts. A respirometer bulb with a small water reservoir at the bottom and hollow ground glass stopper at top in the neck with a hole which can be closed or opened by turning the stopper, a graduated burette opening out of the bulb which connects to a leveling tube via a rubber tubing. Respirometer chamber 50 mm dia, burette 180 x 20 mm graduated 0 to 25 ml and 100 to 75 ml, with special clamp for fixing to a 12 mm dia rod.
B13368
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